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4. PARTICIPANT
Participants of KAN Proficiency Testing Program are mainly accredited testing, and calibration laboratories. Non accredited laboratories may also participate in
KAN Proficiency Testing Program regardless their status as far as they follow KAN rule and procedure on Proficiency Testing.
5. CONFIDENTIALITY
As for KAN ’s assessment activities, all information supplied by participants are
treated as confidential. This information will, however, be made available to the assessors of laboratory, the PTEG and KAN technical committee. All of these
people are fully aware of confidentiality of the results.
6. FUNDING
The current policy is to levy each participant in aprogram with a fee that contributes to the cost for conducting that program. The varies from program to
program and participants are notified accordingly prior to commencement the program.
7. TESTING INTERLABORATORY COMPARISONS 7.1
Introduction Most of interlaboratory comparisons conducted by KAN are subdivided samples
taken from a bulk sample that are distributed to participating laboratories which test them concurrently. They then return results to KAN for analysis.
7.2 Working Group and Program Design
KAN proficiency testing is carried out annually. The program for each year is selected by KAN PT at the beginning of the respective year.
The preparation of program includes :
nomination of tests to be conducted, range of values to be included, test methods to be used and number design of samples required;
preparation of paperwork instructions and results sheet particularly with reference to reporting formats, number of significant figuresdecimal places
to which results should be reported and correct units for reporting; technical commentary in the final report and in some cases evaluation of
replies submitted by laboratories which were requested to investigate extreme results.
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An appropriate statistical design is essential and therefore must be established during the preliminary stages of the program based on ISO 13528.
7.3 Documentation
The main documents associated with the initial phase of a proficiency program are:
a Letter of Intent
This is sent to prospective participants, including all accredited and applicant laboratories to advise that the program will be conducted and provides
information on the type of samples and tests which will be included, the schedule and participation fees.
b Instructions to Participants
These are carefully designed for each individual program and participants are always asked to adhere closely to them.
c Results Sheet For most program, results sheet is supplied to enable consistency in the
statistical treatment of results. Instructions and results sheets may be issued with or prior to the dispatch of
samples.
7.4 Packaging and Dispatch of Samples
The packaging and method of transport of the samples are considered carefully to ensure that they are adequate and able to protect the stability and
characteristics of the samples. Certain restrictions on transport such as dangerous goods regulations or customs requirements are complied with.
7.5 Receipt
of
Results Results from participating laboratories for KAN
’s proficiency testing programs are required to be sent to Secretariat of KAN. A
‘due date’ for return of results is set for each program, usually allowing laboratories two to three weeks to test the
samples. If any results are outstanding after the due date reminders are issued. However, as late results may not be included in the data analysis, laboratories
are strongly encouraged to submit all results on time.
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7.6 Analysis of Data and Reporting of results
Results are usually analysed together with necessary distinctions made for method variation to give consensus values for the entire group. The results
received from participating laboratories are entered and analysed as soon as practicable so that an interim report can be issued to participants within two to
four weeks of the due date for results.
This letter includes preliminary feedback including the consensus values for each testsample and also features of the program
’s design. Laboratories reporting one or more results that are significantly different from the
consensus values are encouraged to commence investigativecorrective action prior to the release of the final report.
The evaluation of the results i s described in ISO 13528. A final report is produced at the completion of a program and includes data
on the distribution of results from all laboratories, together with an indication of each participant
’s performance. This report typically contains the following information:
a introduction b features of the program - number of participants, sample description, tests to
be carried out c results from participants
d statistical analysis, including graphical displays and data summaries e a table summarising the extremed results
f technical comments on possible causes of extreme results, method
effects overall performance etc. g sample preparation and homogeneity testing information
h a copy of the instructions to participants and results sheet
7.7 Follow-up of PT Results Laboratories reporting extreme and outlier results for accredited tests are
requested to investigate and report back to KAN, as described in KAN P 06.
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8. Calibration Interlaboratory Comparisons 8.1 Introduction
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