ISO/IEC 24735:2021

Information technology — Office equipment — Method for measuring digital copying productivity

This document specifies a method for measuring the digital copying productivity of digital copying devices and multifunctional devices with various copying modes. It is applicable to digital copying devices and multifunctional devices equipped with automatic document feeder (ADF) and collating function. This document is intended to be used for black and white (B&W) as well as colour digital copying devices and multifunctional devices of any underlying marking technology. It allows comparison of the throughput copying rates for a machine operated in various available operating modes (simplex, duplex, size of substrates, 2-up, etc.) and various available digital image processing configurations. This document includes test files, test setup procedures, test procedures, and reporting requirements for digital copying productivity measurements. This document is not intended to be used for devices which are not able to copy on a media size of A4/8,5” × 11”, devices that do not have an ADF, or devices which are not able to collate multiple copies of original prints from a test set. This document is not intended to replace manufacturer's rated speeds.

Technologies de l'information — Équipements de bureau — Méthode de mesure de la productivité d'un photocopieur numérique

General Information

• Status: Published
• Publication Date: 08-Apr-2021
• ICS: 37.100.10 - Reproduction equipment
• Technical Committee: ISO/IEC JTC 1/SC 28 - Office equipment
• Drafting Committee: ISO/IEC JTC 1/SC 28/WG 3 - Productivity
• Current Stage: 6060 - International Standard published
• Start Date: 09-Apr-2021
• Due Date: 22-Jun-2021
• Completion Date: 09-Apr-2021

Relations

• Revises: ISO/IEC 24735:2012 - Information technology — Office equipment — Method for measuring digital copying productivity
• Effective Date: 30-Sep-2017

Standards Content (Sample)

INTERNATIONAL ISO/IEC
STANDARD 24735
Third edition
2021-04
Information technology — Office
equipment — Method for measuring
digital copying productivity
Technologies de l'information — Équipements de bureau — Méthode
de mesure de la productivité d'un photocopieur numérique
Reference number
©
ISO/IEC 2021
© ISO/IEC 2021
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO/IEC 2021 – All rights reserved

Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Test parameters and conditions . 3
4.1 Copying device setup . 3
4.2 Copying device condition . 4
4.3 Sample size . 4
4.4 Paper . 4
4.5 Maintenance . 5
4.6 Preparation of test targets (test charts) . 5
4.7 Environment . 5
4.8 Voltage . 6
5 Test method . 6
5.1 Overview . 6
5.2 Test measurement procedure . 6
5.2.1 Test setup . 6
5.2.2 “1 set” test from ready. 7
5.2.3 “1 set + 30 seconds” test from ready . 8
5.2.4 “1 set + 4 minutes” test from ready . 8
5.3 Test method process . 9
5.3.1 Suggested flow chart . 9
5.3.2 ±5 % consistency criteria .10
5.3.3 Estimating the set count .11
5.4 General performance test .12
5.4.1 Overview .12
5.4.2 Measurement of FSOT and ESAT .12
5.4.3 Measurement of EFTP .12
5.5 Feature performance test .13
5.5.1 Overview .13
5.5.2 Features setting conditions .13
5.5.3 Measurement of FSOT and ESAT .15
6 Calculations and treatment of data .15
6.1 Overview .15
6.2 General performance test .16
6.2.1 “1 set” test from ready.16
6.2.2 “1 set + 30 seconds” test from ready .16
6.2.3 “1 set + 4 minutes” test from ready .17
6.3 Feature performance test .18
6.3.1 “1 set” test from ready.18
6.3.2 “1 set + 30 seconds” test from ready .19
7 Presentation of results .19
7.1 Sharing testing and reports .19
7.2 General performance test .20
7.2.1 Overview .20
7.2.2 Minimum declaration .20
7.2.3 Summary report .20
7.2.4 Full report .21
7.3 Feature performance test .22
7.3.1 Overview .22
7.3.2 Summary report .23
© ISO/IEC 2021 – All rights reserved iii

7.3.3 Full report .23
Annex A (informative) Report presentation .24
Annex B (normative) Full detailed report example .29
Annex C (normative) Test targets for measurement of copying productivity .34
Annex D (normative) Procedure to establish ready delay time .36
Annex E (informative) Definitions of “FCOT” and “continuous copying speed” .39
Bibliography .40
iv © ISO/IEC 2021 – All rights reserved

Foreword
ISO (the International Organization for Standardization) and IEC (the International Electrotechnical
Commission) form the specialized system for worldwide standardization. National bodies that
are members of ISO or IEC participate in the development of International Standards through
technical committees established by the respective organization to deal with particular fields of
technical activity. ISO and IEC technical committees collaborate in fields of mutual interest. Other
international organizations, governmental and non-governmental, in liaison with ISO and IEC, also
take part in the work.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for
the different types of document should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives or www .iec .ch/ members
_experts/ refdocs).
Attention is drawn to the possibility that some of the elements of this document may be the subject
of patent rights. ISO and IEC shall not be held responsible for identifying any or all such patent
rights. Details of any patent rights identified during the development of the document will be in the
Introduction and/or on the ISO list of patent declarations received (see www .iso .org/ patents) or the IEC
list of patent declarations received (see patents.iec.ch).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www .iso .org/
iso/ foreword .html. In the IEC, see www .iec .ch/ understanding -standards.
This document was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology,
Subcommittee SC 28, Office equipment.
This third edition cancels and replaces the second edition (ISO/IEC 24735:2012), which has been
technically revised.
The main changes compared to the previous edition are as follows:
— Clause 3 has been modified to add new definitions and removed definitions of terms not used in
the text;
— added “ready delay time” requirement to “test measurement” procedures;
— annex structure has been changed to be consistent with other productivity standards;
— added minimum declaration example to Annex A;
— added Annex D for the procedure to determine the “ready delay time”.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html and www .iec .ch/ national
-committees.
© ISO/IEC 2021 – All rights reserved v

Introduction
Many digital copying devices produce copied pages at a different rate than their nominal speed when
running with different modes (simplex, duplex, copying quality modes), different substrate grammage
and collating and/or finishing options. The degree to which a reduction in productivity is experienced
depends significantly on other parameters of the job stream. The most dominant of the parameters of
the job stream are: the number of original pages in a set to be printed, whether output pages are single-
sided or double-sided, image quality modes selected, B&W and colour reproduction job stream, number
of print sets to be produced, substrate size used, run length and finishing options.
This document provides a general method for measuring productivity when the above-mentioned job
stream parameters for digital copying devices are taken into consideration. This document also includes
instructions for the creation of test charts. It allows manufacturers and buyers of digital copying
devices to describe the productivity of various digital copying devices with respect to representative
office usage.
vi © ISO/IEC 2021 – All rights reserved

INTERNATIONAL STANDARD ISO/IEC 24735:2021(E)
Information technology — Office equipment — Method for
measuring digital copying productivity
1 Scope
This document specifies a method for measuring the digital copying productivity of digital copying
devices and multifunctional devices with various copying modes. It is applicable to digital copying
devices and multifunctional devices equipped with automatic document feeder (ADF) and collating
function. This document is intended to be used for black and white (B&W) as well as colour digital
copying devices and multifunctional devices of any underlying marking technology. It allows comparison
of the throughput copying rates for a machine operated in various available operating modes (simplex,
duplex, size of substrates, 2-up, etc.) and various available digital image processing configurations. This
document includes test files, test setup procedures, test procedures, and reporting requirements for
digital copying productivity measurements.
This document is not intended to be used for devices which are not able to copy on a media size of
A4/8,5” × 11”, devices that do not have an ADF, or devices which are not able to collate multiple copies
of original prints from a test set.
This document is not intended to replace manufacturer's rated speeds.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 536, Paper and board — Determination of grammage
ISO 2470-1, Paper, board and pulps — Measurement of diffuse blue reflectance factor — Part 1: Indoor
daylight conditions (ISO brightness)
ISO/IEC 24734, Information technology -- Office equipment--Method for measuring digital printing
productivity
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO/IEC 24734 and the
following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
cpm
copies per minute
copying rate, excluding time to first page copied, measured when producing pages in a continuous
copying mode for one minute with a single static document using a nominal grammage substrate
Note 1 to entry: Nominal copying speed is expressed in copies per minute or images per minute (ipm) (3.5).
© ISO/IEC 2021 – All rights reserved 1

3.2
duplex
duplex copying
two-sided copying
1:2 mode
2:2 mode
use of a copying device to make a number of copies with the copying being done on both sides
of the sheet
Note 1 to entry: 1:2 mode refers to simplex originals that are copied to 2-sided output.
Note 2 to entry: 2:2 mode refers to two sided originals that are copied to 2-sided output.
3.3
feature performance test
optional test used to evaluate productivity changes with various copying and finishing
features enabled
Note 1 to entry: The feature performance test suite is run with default copying system settings to establish a
base line, and then with the selected feature (e.g. stapling) ON, for comparison.
3.4
full report
presentation of results including the first set out time (FSOT), estimated saturated throughput
(ESAT) and effective throughput (EFTP) values in general performance tests (3.6) or the FSOT and ESAT
values in feature performance tests (3.3) as well as the calculated averages for each value
3.5
ipm
images per minute
copy rate, excluding time to first page copied, as measured when producing pages in a continuous copy
mode for one minute with a single static document using a nominal grammage substrate
Note 1 to entry: Nominal copying speed is expressed in copies per minute (cpm) (3.1) or images per minute.
3.6
general performance test
test used to evaluate productivity of default features
3.7
simplex copying
one-sided copying
simplex to simplex
1:1 mode
use of a copying device when only a single side of a sheet is copied on
3.8
summary report
presentation of results, including the average overall first set out time (FSOT) and estimated saturated
throughput (ESAT) in general performance tests (3.6) or the ratio of the copying performance such as
FSOT and ESAT with the subject feature ON versus the copying device default base line performance
(without the subject feature ON) in feature performance tests (3.3)
3.9
test file
digital file used for creating test targets (3.12)
2 © ISO/IEC 2021 – All rights reserved

3.10
test run
operation of copying all pages of targets from a test file (3.9), in a particular system configuration, with
a particular set and page count
Note 1 to entry: Copy times are recorded for each test run.
3.11
test set
all of the pages of targets from a test target (3.12)
3.12
test target
test chart
hard copy document used for testing per the test method, and created from a test file (3.9)
4 Test parameters and conditions
4.1 Copying device setup
Place the copying device on a horizontal surface and set up the copying device according to the
manufacturer's recommendations.
The copying device shall be fully enclosed in its normal exterior cover. All image and copying
modes should be at their factory preset configuration for the copying device. It is assumed that the
settings listed in Table 1 are common to all copying devices. These listed settings shall be set to the
manufacturer's default or preset condition for the device. If a device has settings not listed in Table 1,
they too shall be set to default settings. For copying devices that have additional print quality and
digital image processing features, those features shall be set to match their normal default condition
and included in the result reporting.
Multiple copy output shall be collated. If collated output is not included in the default settings, follow
the manufacturer’s recommendation for obtaining collated output. In the case that collation settings do
affect performance, the faster of the results should be reported. As with other settings, the test report
shall disclose the manner in which collation was achieved.
Single and multiple copy output will be ordered according to “default settings”. It is assumed that
“default settings” will yield original order output for a dual output order device that supports both
original order and reverse order output. If the default settings on a dual output order device yields
reverse order output, then testing using original order output is required for the 1 set + 30 seconds test
and the 1 set + 4 minutes test runs, optional for 1 set test.
If not the default and if supported, optional original order output on 1 set test may be done by following
the manufacturer’s instructions on how to change the copying device for the result of producing original
order output. If other settings change automatically as a result of changing to original order output this
shall be noted on the test report.
Disabling manufacturer default installed features, routines or applications, is not allowed.
EXAMPLE 1 Examples of routines that may not be disabled include, but are not limited to the following:
— automatic cleaning;
— calibration cycles;
— energy save settings.
If the system has automatic media detect (automatic paper type selection), it can be disabled, and paper
used in the test shall be selected manually. This shall be noted in the full detailed report (see Annex B).
The following preset values in the test will be noted on this report format. Additional optional tests
with non-default settings or configurations may be run.
© ISO/IEC 2021 – All rights reserved 3

If the copying device is setup with internal or external options such as memory, sorter, or finisher as
default, then these options shall be noted on the full detailed report format in the configuration options
as shown in Annex B.
EXAMPLE 2 Examples of configuration options to be noted in the full detailed report:
— finisher as default;
— 160GB HDD installed.
Table 1 — Preset settings
Preset item Preset value
Output resolution Default
Output quality Default
Copying mode Default
Mode
Auto density adjustment Default
Activated (tests with copy set count >= 2)
Collating function
Default (tests with copy set count = 1)
Paper sending direction Default
Paper
Paper type setting Default
Paper feeding Standard cassette
Paper exit Standard exit tray
Paper-path
Face up exit Default
Duplex copying unit Default (used in 1:2 mode and 2:2 mode).
Fixing capability Default
Image quality stability Default
Temporary stop
Capacity of paper Default
Others Default
4.2 Copying device condition
All supplies used in the test(s), including paper and printing device consumables, shall be only those
specified as acceptable for use by the manufacturer (or otherwise noted). If available, the number
of pages printed on the engine and printed on the consumables prior to the start of the test shall be
recorded and reported. The machine and all of its necessary supplies shall be acclimated in the test
environment prior to conducting the test(s) at least 8 h.
4.3 Sample size
Each target shall be tested and measured at least twice for repeatability. All required tests shall be run
using one device.
4.4 Paper
The output paper used in this test shall be within the range of, and/or not violate, specific written
attribute guidelines and recommendations provided by the copying device manufacturer, which may
include but are not limited to: size, grammage, composition, paper manufacturer(s), paper type, part
number and other physical characteristics. Care shall be taken to use a paper that conforms to the
copying device manufacturers' paper specifications for the default copying device settings. The paper
used for the general performance test (5.4) shall be cut sheet, A4 and/or 8,5” × 11” (215,9 mm x 279,4 mm)
size. Optional paper sizes may be used in the feature performance tests such as 8,5” × 14”, A3, and/
or 11” × 17” (279,4 mm × 431,8 mm) size as appropriate for the test mode. The paper manufacturer,
grammage, size and paper type/name used in each test shall be noted on the full detailed report.
4 © ISO/IEC 2021 – All rights reserved

When sheets of paper of the size other than A4/A3 are used, the sizes shall be indicated in the places
of A4 and A3 in the measurement results tables. When a comparison needs to be made between the
productivity of one machine with that of other machines, the measurement shall be done with the same
paper sizes. If the copying device employs “thick paper mode” for copying, then this optional mode shall
be noted in the machine setup information of the full detailed report specified in Annex B.
4.5 Maintenance
Copying device maintenance shall be performed throughout testing per the manufacturer's
recommendations on an as needed basis.
EXAMPLE Device maintenance examples:
— cleaning routines;
— consumables replacement.
4.6 Preparation of test targets (test charts)
The copying test file is outlined in Annex C.
The test file consists of four single sided pages. When using the test file for the copying productivity test,
the test targets shall be created by printing the most recent electronic test file. If the intended machine
does not have a printer function, then record the name of printer which is used to print out the actual
test targets. The test targets shall be reordered to match the original electronic test file page order.
For preparation method for double sided targets, follow the outline in Annex C.
The quality of test targets may affect the productivity measurement. Test targets should be created
according to the following instructions.
a) The test targets shall be printed by the equipment to be tested itself in its default-printing mode.
b) The paper used for creating the test targets shall have a brightness of at least 80 % to eliminate the
influence of background.
c) The paper used for creating the test targets shall be 64 g/m or above and sufficiently opaque to
prevent copying of images on the backside.
d) The paper used for creating the test targets shall be free of wrinkles or other surface defects.
e) Confirm that there are no defects such as unexpected dots or contamination on the paper.
f) Page scaling shall not be used. Typically, this is done by setting page scaling to “none”. Options such
as “Fit to printable area” shall not be used.
The brightness shall be measured according to ISO 2470-1. The paper grammage shall be measured
according to ISO 536.
4.7 Environment
The test environment, including temperature and humidity, shall be within the ranges recommended
by the manufacturer for operating the device. If no recommendation is available, the following ranges
shall apply:
— temperature: 18 °C to 25 °C,
— relative humidity: 30 % to 70 %.
The temperature and humidity of the test environment should be recorded in the full detailed report.
© ISO/IEC 2021 – All rights reserved 5

4.8 Voltage
Input line voltage may affect productivity. The copying device shall be connected to a voltage supply
within the manufacturer specified operating voltage range for the copying device under test. The
voltage should be measured under no-load condition prior to each test suite and recorded in the full
detailed report.
NOTE It is possible that devices that utilise a heater have a longer FSOT time when the line voltage is at the
lower value of the recommended operating range.
5 Test method
5.1 Overview
A single set of each test target is copied and measured to determine FSOT .
1set
Multiple, N sets, of each test target are measured for the 1 set + 30 seconds test run to calculate ESAT
30sec
and EFTP , where N is the number of sets needed to meet LSOT –FSOT ≥ 30 s. This method is
30sec 30sec 30sec
used to provide varying tests for products across varying segments. This simple approach allows faster
products to be tested with more sets and slower products to be tested with fewer sets without defining
and categorizing products by segment.
The 1 set + 4 minutes test is a similar concept used to calculate EFTP and is intended to provide
4min
a test to illustrate that differences in productivity can occur for longer copying times compared to
shorter copying times. It is understood and recognized that 4 min may be a long test for some devices,
but a short test for other, higher-end devices. The 4 min time is a compromise to meet the needs of the
many products across many segments covered in the scope of this document.
In order to ensure clarity between the results of each test and to avoid test result confusion that can be
caused by back to back job spooling effect, each copy job test should be started only after the last copy of
the previous test has been fully ejected from the machine and the device has returned to a ready state.
Repeat the (1 set test, 1 set + 30 seconds test, and 1 set + 4 minutes test) for each required/optional test
target, test suite, as applicable for the relevant copying modes on the device under test. (See 7.2.)
5.2 Test measurement procedure
5.2.1 Test setup
Before testing, the following setup activities shall be completed.
a) Install the copying device following the manufacturer's recommendations.
b) Clean the surface of the image scanning device if needed.
c) The default required tests shall be run after the copying device has warmed up and entered a ready
state. Use of warm-up copying (that means at least one page is copied just before testing) to ready
the copying device is required in order to establish the job ready delay time.
d) Set the system parameters (such as paper grammage selection, paper size and feed orientation,
quality mode, collate) for test. Record the copying device model, configuration (options), default
condition and any other variations if selected. If the system has automatic media detect (automatic
paper type selection), it can be disabled, and paper used in the test shall be selected manually. This
shall be noted in the full detailed report.
e) Refer to Annex B for an example of settings to record. Refer to 5.4 for information on required
tests and 5.5 for information on running the optional feature performance tests. Refer to Clause 6
for information on the calculation and treatment of data. Refer to Clause 7 for information on data
reporting.
6 © ISO/IEC 2021 – All rights reserved

f) Prepare and set the test targets that will be used in the test, identified as described in 4.6.
g) Refer to 5.4 and 5.5 to decide what tests are to be run.
h) Determine the ready delay time between jobs. The (1 set test, 1 set + 30 seconds test, and
1 set + 4 minutes test) from ready for some devices is sensitive to the ready delay time from the
exit of the last page of the previous print job to the initiation of the next job. The ready delay time
used shall be no shorter than 20 s and no longer than 50 s; however, care shall be taken to select a
ready delay time that places the device in a stable condition. If the tester is unsure of what ready
delay time will place the device in a stable condition, the procedure in Annex D shall be used to
establish a ready delay time to place the device in a stable condition. The ready delay time used
may be different from what Annex D would indicate as long as the (1 set test, 1 set + 30 seconds
test, and 1 set + 4 minutes test) result is equivalent to the (1 set test, 1 set + 30 seconds test, and
1 set + 4 minutes test) at the ready delay time that Annex D would have selected. It shall be noted in
the full report the ready delay time and whether a ready delay time found with Annex D was used.
NOTE 1 In general electro-photographic devices are in a stable condition at 50 s, although many devices are
in a stable condition in less than 50 s. With inkjet devices, an unstable condition happens during a print head
capping or servicing routine.
NOTE 2 Measurement of printing productivity in a multi-function device (MFD) is measured according to
ISO/IEC 24734. Only copying productivity function can be measured according to this document.
5.2.2 “1 set” test from ready
The procedure to measure FSOT and EFTP is defined by the following steps.
1set 1set
a) Enter copy set count = 1 and press the copy start button. Start the ready delay timer when the last
page has fully exited from the device.
NOTE 1 Step a)  is skipped when the ready delay timer is started at the end of a different test.
b) Enter copy set count = 1 required for this specific test run on the copying device operation panel. If
original document order is not the default, optionally select any necessary output order options to
ensure that the 1 set run copies the output in original document order (ABCD).
c) [Start test run] At the end of the ready delay time, press the copy start button and simultaneously
start the timing device (watch or otherwise).
d) Record the time for completion of one set to at least two decimal places and start the ready
delay timer.
e) [End test run]
f) Run the “1 set” test, steps b) – e), twice. Calculate the average FSOT and EFTP for each test
1set 1set
run according to Clause 6.
g) Determine if the results are consistent within ±5 % according to 5.3.2 and perform a third test
run if required. (The data from the test is average of the individual runs. Three iterations are the
maximum and the results from all iterations are averaged to get the required data.)
h) Calculate the average FSOT and EFTP according to Clause 6.
1set 1set
i) Repeat steps a) – h) for each required copying mode (1:1, 1:2, 2:2) which are available on the copying
device under test.
NOTE 2 The average FSOT for this test set is reported in the summary report, the full report and the
1set
full detailed report as FSOT. For details, see Annex A and Annex B for an example of report presentation.
© ISO/IEC 2021 – All rights reserved 7

5.2.3 “1 set + 30 seconds” test from ready
The procedure to measure ESAT and EFTP is defined by the following steps.
30sec 30sec
a) Enter copy set count = 1 and press copy start button. Start the ready delay timer when the last page
has fully exited from the device.
NOTE 1 Step a)  is skipped when the ready delay timer is started at the end of a different test.
b) Enter copy set count = N required for LSOT –FSOT ≥ 30 s. Select any necessary collate and
30sec 30sec
output order options to ensure that multiple set runs copy the output in collated original order
(1234., 1234 .). For the second and third tests, use the same set count as used in the first test.
NOTE 2 This FSOT is not the same as the FSOT from the 1 set test. The FSOT measured is used
30sec 1set 30sec
to verify LSOT –FSOT ≥ 30 s and to calculate ESAT .
30sec 30sec 30sec
c) [Start test run] At the end of the ready delay time, press the copy start button and simultaneously
start the timing device (watch or otherwise).
d) Record the time for completion of FSOT to at least two decimal places. This is the time from
30sec
pressing the copy button until the fourth page of the first test set is fully ejected from the machine.
NOTE 3 If the output paper bin capacity is less than the number of pages to be copied, the output paper is
removed during the test.
e) Record the time for completion of LSOT to at least two decimal places. This is the time from
30sec
th
pressing copy button until the last page of the N test set is fully ejected from the machine and
start the ready delay timer.
f) [End test run]
g) Run the 1 set + 30 seconds test, steps b) – f), twice. Calculate ESAT and EFTP for each test
30sec 30sec
run according to Clause 6.
h) Determine if the results are consistent within ±5 % according to 5.3.2 and perform a third test run
if required. (The data from the test is average of the individual runs. Three iterations are the max
and the results from all iterations are averaged to get the required data.)
i) Calculate the average ESAT and EFTP according to Clause 6.
30sec 30sec
j) Repeat steps a) – i) for each required copying mode (1:1, 1:2, 2:2) which are available on the copying
device under test.
NOTE 4 The average ESAT for this test set is reported in the summary report, the full report and the
30sec
full detailed report as ESAT. For detail, see Annex A and Annex B for an example of report presentation.
5.2.4 “1 set + 4 minutes” test from ready
The procedure to measure EFTP is defined by the following steps.
4min
a) Enter copy set count = 1 and press the copy start button. Start the ready delay timer when the last
page has fully exited from the device.
NOTE 1 Step a)  is skipped when the ready delay timer is started at the end of a different test.
b) Enter print set count = N required for LSOT –FSOT ≥ 4 min. Select any necessary collate and
4min 4min
output order options to ensure that multiple set runs copy the output in collated original order
(1234., 1234 .). For the second and third tests, use the same set count as used in the first test.
NOTE 2 This FSOT is not the same as FSOT from the 1 set test. The FSOT measured here is only
4min 1set 4min
used to verify LSOT –FSOT ≥ 4 min.
4min 4min
8 © ISO/IEC 2021 – All rights reserved

c) [Start test run] Press the copy button and simultaneously start the timing device (watch or
otherwise).
d) Record the time for completion of the FSOT to at least two decimal places. This is the time from
4min
pressing the copy button until the fourth page of the first test set is fully ejected from the machine.
NOTE 3 If the output paper bin capacity is less than the number of pages to be copied, the output paper is
removed from the output paper bin during the test.
e) Record the time for completion of LSOT to at least two decimal places. This is the time from
4min
th
pressing copy button until the last page of the N test set is fully ejected from the machine.
f) [End test run]
g) Run the 1 set + 4 min test, steps b) – f), twice. Calculate EFTP for each test run according to
4min
Clause 6.
h) Determine if the results are consistent within ±5 % according to 5.3.2 and perform a third test run
if required. (The data from the test is average of the individual runs. Three iterations are the max
and the results from all iterations are averaged to get the required data.)
i) Calculate the average EFTP according to Clause 6.
4min
j) Repeat steps a) – i) for each required copying mode (1:1, 1:2, 2:2) which are available on the copying
device under test.
5.3 Test method process
5.3.1 Suggested flow chart
The suggested test execution flow is shown in Figure 1.
© ISO/IEC 2021 – All rights reserved 9

Figure 1 — Test flow chart
5.3.2 ±5 % consistency criteria
If the first two test runs are not consistent within ±5 %, then a third test run is required. Formulae for
ESAT and EFTP can be found in Clause 6.
2 × S
FSOT ,1
c = − 1
FSOT
SS +
FSOT ,1FSOT ,2
10 © ISO/IEC 2021 – All rights reserved

2 × S
ESAT ,1
c = − 1
ESAT
SS +
ESAT ,1ESAT ,2
2 × S
EFTP ,1
c = − 1
EFTP
SS +
EFTP ,1EFTP ,2
where
S is the first measured first set out time (FSOT );
FSOT,1 1
S is the second measured first set out time (FSOT );
FSOT,2 2
c is the consistency of FSOT;
FSOT
S is the first measured estimated saturated throughput (ESAT );
ESAT,1 1
S is the second measured estimated saturated throughput (ESAT );
ESAT,2 2
c is the consistency of ESAT;
ESAT
S is the first measured first set out time (EFTP );
EFTP,1 1
S is the second measured first set out time (EFTP );
EFTP,2 2
c is the consistency of EFTP.
EFTP
If the 1 set + 4 minutes test estimated copy count is greater than the maximum copy count or input tray
capacity, this test shall not be run and reported as N/A in the test report.
5.3.3 Estimating the set count
5.3.3.1 Overview
This estimation shall be done when multiple test sets are copied.
5.3.3.2 ‘1 set + 30 seconds test’
The test may begin with an initial set count N = 2 or by estimating the number of sets needed,
initial
provided that the tester has sufficient information for estimation beforehand. If the N = 2 test result did
not meet the LSOT–FSOT ≥ 30 s requirement, then calculate necessary set count estN as follows and
30sec
test using the new estN as the set count. The following formula can be used to estimate the number
30sec
of sets needed:
 30 ×−N 1 
()
initial
N = Roundup + 1
 
est,30sec
SS −
 
LSOT ,initial FSSOT ,initial
 
where
N is the estimated number of sets needed for N ≥ 30 s;
initial est,30sec
S is the last set out time with N sets (LSOT );
LSOT,initial initial initial
S is the first set out time with N sets (FSOT );
FSOT,initial initial initial
N is the estimated set count for 1 set + 30 seconds (estN ).
est,30,sec 30sec
© ISO/IEC 2021 – All rights reserved 11

The number of sets tested should result in LSOT –FSOT ≥ 30 s as close as possible. If the results of
30sec 30sec
a test run gives LSOT –FSOT < 30 s the number of sets shall be increased and all runs re-tested.
30sec 30sec
NOTE The 1 set + 30 seconds test is devised to make LSOT –FSOT long enough to minimise
30sec 30
...