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

ISO/IEC 24735:2012 specifies a method for measuring the "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 and collating function.

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

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Status
Replaced
Publication Date
06-Jun-2012
Withdrawal Date
06-Jun-2012
Current Stage
9599 - Withdrawal of International Standard
Completion Date
07-Jun-2012
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INTERNATIONAL ISO/IEC
STANDARD 24735
Second edition
2012-06-15
Information technology — Office
equipment — Method for measuring
digital copying productivity
Technologie de l'information — Équipements de bureau — Méthode de
mesure de la productivité d'un photocopieur numérique
Reference number
ISO/IEC 24735:2012(E)
ISO/IEC 2012
---------------------- Page: 1 ----------------------
ISO/IEC 24735:2012(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO/IEC 2012

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,

electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or

ISO's member body in the country of the requester.
ISO copyright office
Case postale 56  CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO/IEC 2012 – All rights reserved
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ISO/IEC 24735:2012(E)
Contents Page

Foreword ............................................................................................................................................................ iv

Introduction ......................................................................................................................................................... v

1 Scope ...................................................................................................................................................... 1

2 Normative references ............................................................................................................................ 1

3 Terms and definitions ........................................................................................................................... 1

4 Test Parameters and Conditions ......................................................................................................... 3

4.1 Environment ........................................................................................................................................... 3

4.2 Voltage .................................................................................................................................................... 3

4.3 Copying Device Setup ........................................................................................................................... 3

4.4 Paper ....................................................................................................................................................... 4

4.5 Maintenance ........................................................................................................................................... 4

4.6 Preparation of Test Targets (Test Charts) .......................................................................................... 4

5 Test Method ........................................................................................................................................... 5

5.1 Test Setup .............................................................................................................................................. 5

5.2 Test Measurement Procedure .............................................................................................................. 5

5.3 Test Method Process ............................................................................................................................ 8

5.4 General Performance Test .................................................................................................................. 10

5.5 Feature Performance Test .................................................................................................................. 11

6 Calculations and Treatment of Data .................................................................................................. 14

6.1 General Performance Test .................................................................................................................. 15

6.2 Feature Performance Test .................................................................................................................. 16

7 Presentation of Results ...................................................................................................................... 17

7.1 General Performance Test .................................................................................................................. 17

7.2 Feature Performance Test .................................................................................................................. 19

Annex A (informative) Examples of report presentation .............................................................................. 20

Annex B (informative) Example of full detailed report .................................................................................. 23

B.1 General ................................................................................................................................................. 23

B.2 Machine Setup Information and Pre-set items ................................................................................. 23

B.3 Measurement Results for General Performance Test ..................................................................... 24

B.4 Measurement Results for Feature Performance Test ...................................................................... 24

B.5 Other special modes ........................................................................................................................... 25

Annex C (normative) Test targets for measurement of copying productivity ............................................ 26

Annex D (informative) Definitions of “FCOT” and “Continuous Copying Speed” ..................................... 27

Bibliography ...................................................................................................................................................... 30

© ISO/IEC 2012 – All rights reserved iii
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ISO/IEC 24735:2012(E)
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. In the field of information

technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC 1.

International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.

The main task of the joint technical committee is to prepare International Standards. Draft International

Standards adopted by the joint technical committee are circulated to national bodies for voting. Publication as

an International Standard requires approval by at least 75 % of the national bodies casting a vote.

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.

ISO/IEC 24735 was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology,

Subcommittee SC 28, Office equipment.

This second edition cancels and replaces the first edition (ISO/IEC 24735:2009), which has been technically

revised. It also incorporates the Technical Corrigendum ISO/IEC 24735:2009/Cor.1:2009.

iv © ISO/IEC 2012 – All rights reserved
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ISO/IEC 24735:2012(E)
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 weight 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 ouput 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. The existing International Standard (ISO/IEC 14545) only addresses

the productivity issues for light-lens B&W copying device/duplicators and does not take into account these

important machine and job related factors for digital copying devices.
© ISO/IEC 2012 – All rights reserved v
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INTERNATIONAL STANDARD ISO/IEC 24735:2012(E)
Information technology — Office equipment — Method for
measuring digital copying productivity
1 Scope

This International Standard specifies a method for measuring the “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 and collating function. This International

Standard 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 International Standard includes test

files, test setup procedures, test procedures, and reporting requirements for digital copying productivity

measurements.

This International Standard is not intended to be used for devices which are not able to copy on a media size

of A4/8.5"x11", devices that do not have an automatic document feeder (ADF), or devices which are not able

to collate multiple copies of original prints from a test set.

This International Standard is not intended to replace manufacturer's rated speeds.

2 Normative references

The following referenced documents are indispensable for the application 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 2470-1:2009, Paper, board and pulps — Measurement of diffuse blue reflectance factor — Part 1: Indoor

daylight conditions (ISO brightness)
ISO 536:1995, Paper and board — Determination of grammage
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
duplex copying

use of a copying device to make a number of copies with the copying being done on both sides of the sheet

NOTE An equivalent term is “two-sided copying” and referred to as 1:2 mode or 2:2 mode.

3.2
effective throughput
EFTP

average speed at which a device produces pages measured from the initiation of the job through the complete

exit of the last page of the last test set
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ISO/IEC 24735:2012(E)

NOTE EFTP is expressed in images per minute (ipm). EFTP can be affected by the digital processing time of the test

set as well as the run time of the test set.
3.3
estimated saturated throughput
ESAT

rate at which a device produces pages measured from the complete exit of the last page of the first test set

through the complete exit of the last page of the last test set
NOTE ESAT is expressed in images per minute (ipm).
3.4
feature performance test

optional test used to evaluate productivity changes with various copying and finishing features enabled by

providing FSOT and ESAT

NOTE 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.
3.5
first set out time
FSOT

number of seconds between the initiation of the job to the complete exit of the last page of the first test set

NOTE There is a different definition called “FCOT" (first copy out time). “FCOT” and “continuous copying speed” for

EP (electrophotographic) copying machines are defined in ISO/IEC 21117. For reference, the extension of these

definitions, also applied for out of scope copying devices, is shown in Annex D (informative).

3.6
full detailed report
presentation of information including machine setup and measured test results
3.7
full report

presentation of results including the FSOT, ESAT and EFTP values in general performance tests or the FSOT

and ESAT values in feature performance tests as well as the calculated averages for each value

3.8
general performance test

test used to evaluate productivity by providing FSOT, ESAT and EFTP without using any special feature or

mode, and which includes both the simplex copying mode and the duplex copying modes 1:2 and 2:2, if

available
3.9
last set out time
LSOT

number of seconds between the initiation of the job to the complete exit of the last page of the last test set

3.10
nominal copying speed

copying rate, excluding time to first page copied, measured when producing pages in a continuous copying

mode with a single static document using a nominal weight substrate

NOTE Nominal copying speed is expressed in copies per minute or images per minute.

3.11
simplex copying
use of a copying device when only a single side of a sheet is copied on

NOTE Other equivalent terms are “one-sided copying” or “simplex to simplex” referred to as 1:1 mode.

2 © ISO/IEC 2012 – All rights reserved
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ISO/IEC 24735:2012(E)
3.12
summary report

presentation of results, including the average overall FSOT and ESAT in general performance tests 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

3.13
test file
digital file used for creating test targets
3.14
test set
all of the pages of a test target
3.15
test target

hard copy document used for testing per the test method, and created from a test file

NOTE An equivalent term is “test chart”.
4 Test Parameters and Conditions
4.1 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%

NOTE The temperature and humidity of the test environment should be recorded in the full detailed report (Annex B).

4.2 Voltage

The copying device shall be connected to a voltage supply within the manufacturer specified operating voltage

range for the copying device under test.
NOTE The measurement should be made under no-load condition prior to each test.
4.3 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. The machine and all of it's necessary

supplies shall be acclimated in the test environment prior to conducting the test(s) at least 8 hours. All

supplies used in the test(s), included copy paper, shall be those specified by the manufacturer. All image and

copying modes should be at their factory pre-set 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 pre-set 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 must be set to match their normal default condition, and included in the

result reporting. Disabling manufacturer default installed features, routines or applications, is not allowed.

Examples include, but are not limited to the following: automatic cleaning or calibration cycles, and 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 must be noted in the full detailed report (Annex B).

The following pre-set values in the test will be noted on this report format.
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ISO/IEC 24735:2012(E)

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, for example “Finisher as default” or “160GB HDD installed”.
Table 1 — Pre-set Settings
Pre-set item Pre-set value
Output resolution default
Output Quality default
Mode Copying mode default
Auto density adjustment default
Collating function Activated (if not activated in default mode.)
Paper sending direction default
Paper
Paper type setting default
Paper feeding Standard cassette
Paper exit Standard exit tray
Paper-path
default
Face up exit
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
4.4 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

be limited to: size, weight, composition, paper manufacturer(s), paper type, part number and other physical

characteristics. Care must 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

[section 5.4] shall be cut-sheet, A4 and/or 8.5"x11" size. Optional paper sizes may be used in the feature

performance tests such as 8.5"x14", A3, and/or 11"x17" size as appropriate for the test mode. The paper

manufacturer, weight, size and paper type/name used in each test shall be noted on the full detailed report.

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 need 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 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. (For example, cleaning routines or consumables replacement).

4.6 Preparation of Test Targets (Test Charts)
The copying test file is outlined in Annex C (normative).

The test file consists of 4 single sided pages. When using the test file for the copying productivity test, the test

targets must be created by printing the most recent electronic test file. If the intended machine does not have

4 © ISO/IEC 2012 – All rights reserved
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ISO/IEC 24735:2012(E)

a printer function, then record the name of printer which is used to print out the actual test targets. The most

recent official electronic file (ISO_IEC_24735_Test_Pages.pdf) can be located at
http://standards.iso.org/ittf/PubliclyAvailableStandards/SC28_Test_Pages/.

The quality of test targets may affect the productivity measurement. You should create test targets according

to the following notes.

1) The test targets shall be printed by the equipment to be tested itself in its default-printing mode.

2) The paper used for creating the test targets shall have a brightness of at least 80% to eliminate the

influence of background.

3) 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.

4) The paper used for creating the test targets shall be free of wrinkles or other surface defects.

5) Confirm that the there are no defects such as unexpected dots or contaminations.

6) Page scaling shall not be used in general performance test. Typically, this is done by setting page

scaling to “none”. Options such as “Fit to printable area” shall not be used in general performance

test, either.

The brightness shall be measured according to ISO 2470-1:2009. The paper weight shall be measured

according to ISO 536:1995.
5 Test Method
5.1 Test Setup
Before test, the machine under test shall be preconditioned as follows.
1) Install the copying device following the manufacturer's recommendations.
2) Clean the surface of the image scanning device if needed.

3) 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 acceptable.

4) Set the system parameters (such as paper weight selection, paper size and feed orientation, quality

mode) 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 must be

noted in the full detailed report.

Refer to Annex B for an example of settings to record. Refer to section 5.4 for information on required tests

and 5.5 for information on running the optional feature performance tests. Refer to section 6 for information on

the calculation and treatment of data. Refer to section 7 for information on data reporting.

NOTE Measurement of printing productivity in MFD should be measured according to ISO/IEC 24734 International

Standard. Only copying productivity function can be measured according to this International Standard.

5.2 Test Measurement Procedure

A single set of each test target is copied and measured to determine FSOT . Multiple, N sets, of each test

1set

target are measured for the 1 Set + 30 Seconds Test run to calculate ESAT and EFTP , where N is the

30sec 30sec
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ISO/IEC 24735:2012(E)

number of sets needed to meet LSOT –FSOT ≥ 30 seconds. This method is used to provide varying

30sec 30sec

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 less 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

4min

provide 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 minutes may be a long test for some devices,

but a short test for other, higher end devices. The 4 minutes time is a compromise to meet the needs of the

many products across many segments covered in the scope of this International Standard.

(1) Before test, the machine under test shall be preconditioned as described in section 5.1.

(2) Prepare and set the test targets (test charts) that will be used in the test, identified as described in

Section 4.6.
(3) Refer to sections 5.4 and 5.5 to decide what tests are to be run.
1 Set Test Procedure to measure FSOT and EFTP :
1set 1set

1) Enter Copy Set count = 1 required for this specific test run on the copying device

operation panel.

2) [Start Test run] Press copy start button and simultaneously start the timing device

(watch or otherwise).
3) Record the time for completion of one set to at least two decimal places.
4) [End Test run]
5) Run the 1 Set Test [steps 2 – 4] twice. Calculate the average FSOT and EFTP
1set 1set
according to section 6.

6) Determine if the results are consistent within +/- 5% according to section 5.3.3, 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.)
7) Calculate the average FSOT and EFTP according to section 6.
1set 1set

8) Repeat steps 2 – 7 for each required copying mode (1:1, 1:2, 2:2) that is available on

the copying device under test.

NOTE The average FSOT for this test set is reported in the Summary Report, the Full Report

1set

and the Full Detailed Report as FSOT. For detail, see Annex A and Annex B for an example of

report presentation.
1 Set + 30 Seconds Test Procedure to measure ESAT and EFTP :
30sec 30sec
1) Enter Copy Set count = N required to for LSOT –FSOT ≥ 30 Seconds. Select
30sec 30sec

any necessary collate options to insure that multiple set runs copy the output in collated

order (1234..., 1234 ...). For the second and third tests, use the same set count as used

in the first test.
NOTE This FSOT should not be confused with the FSOT from the 1 Set Test. The
30sec 1set
FSOT measured is used to verify LSOT –FSOT ≥ 30 seconds and to calculate
30sec 30sec 30sec
ESAT .
30sec

2) [Start Test run] Press copy start button and simultaneously start the timing device

(watch or otherwise).
6 © ISO/IEC 2012 – All rights reserved
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ISO/IEC 24735:2012(E)

3) Record the time for completion of the FSOT to at least two decimal places. This

30sec

is the time from pressing copy button until the fourth page of the 1st test set is fully

ejected from the machine.

NOTE If the output paper tray size is less than the number of pages to be copied, remove the

output paper during the test.

4) Record the time for completion of the LSOT to at least two decimal places. This is

30sec

the time from pressing copy button until the last page of the test set is fully ejected from

the machine.
5) [End Test run]
6) Run the 1 set + 30 Seconds test [steps 2 – 5] twice. Calculate ESAT and
30sec
EFTP for each Test run according to section 6.
30sec

7) Determine if the results are consistent within +/- 5% according to section 5.3.3, 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.)
8) Calculate the average ESAT and EFTP according to section 6.
30sec 30sec

9) Repeat steps 2 – 8 for each required copying mode (1:1, 1:2, 2:2) that is available on

the copying device under test.

NOTE The average ESAT for this test set is reported in the Summary Report, the Full

30sec

Report and the Full Detailed Report as ESAT. For detail, see Annex A and Annex B for an example

of report presentation.
1 Set + 4 Minutes Test Procedure to measure EFTP :
4min
1) Enter Print Set count = N required to for LSOT –FSOT ≥ 4 minutes. Select any
4min 4min

necessary collate options to insure that multiple set runs copy the output in collated order

(1234..., 1234 ...). For the second and third tests, use the same set count as used in the

first test.
NOTE This FSOT should not be confused with the FSOT from the 1 Set Test. The
4min 1set
FSOT measured here is only used to verify LSOT –FSOT ≥ 4 minutes.
4min 4min 4min

2) [Start Test run] Press copy button and simultaneously start the timing device (watch

or otherwise).

3) Record the time for completion of the FSOT to at least two decimal places. This is

4min

the time from pressing copy button until the fourth page of the 1st test set is fully ejected

from the machine.

NOTE If the output paper tray size is less than the number of pages to be copied, remove the

output paper during the test.

4) Record the time for completion of the LSOT to at least two decimal places. This is

4min

the time from pressing copy button until the last page of the test set is fully ejected from

the machine.
5) [End Test run]

6) Run the 1 Set + 4 Minutes Test [steps 2 – 5] twice. Calculate EFTP for each Test

4min
Run according to section 6.

7) Determine if the results are consistent within +/- 5% according to section 5.3.3, 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.)
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ISO/IEC 24735:2012(E)
8) Calculate the average EFTP according to section 6.
4min

9) Repeat steps 2 – 8 for each required copying mode (1:1, 1:2, 2:2) that is available on

the copying device under test.
5.3 Test Method Process
5.3.1 Suggested Test Method Process Flow Chart
Set number of sets to 1
st nd
Run 1 and 2 Tests
Calculate FSOT and EFTP
+/-5% consistent?
YES NO
Run 3 Test
Calculate FSOT and EFTP
Calculate average FSOT an
...

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