NCSL RP 15 : 2013

1 Purpose
2 Scope
3 Introduction
4 Basic organization and management
   4.1 Outside support
   4.2 Management
        4.2.1 ILC Coordinator
        4.2.2 ILC Data Processor
        4.2.3 ILC Pivot Laboratory
        4.2.4 Participant laboratory
   4.3 Confidentiality
   4.4 Ethics
        4.4.1 Participation
        4.4.2 Anonymity and confidentiality
        4.4.3 Data and analysis
        4.4.4 Publication
        4.4.5 US National Comparisons Database
   4.5 Finances
5 Designing the structure
   5.1 Organizing committee
   5.2 Size
   5.3 Geographical area
   5.4 Participant selection
   5.5 Formal organization
   5.6 Operating officials
   5.7 Charter
6 Planning guidelines
   6.1 Goals
        6.1.1 Standards evaluation
        6.1.2 Calibration or measurement process evaluation
        6.1.3 Methodology evaluation
   6.2 Measurements
        6.2.1 ILC Pivot Laboratory measurements
   6.3 Patterns for interlaboratory comparisons
        6.3.1 Basic (circular) interlaboratory comparison
        6.3.2 Petal interlaboratory comparison
        6.3.3 Hybrid interlaboratory comparison
        6.3.4 Chemical interlaboratory comparison
   6.4 Types of traveling standards and interlaboratory comparisons
        6.4.1 Single artifact interlaboratory comparison
        6.4.2 Multiple artifact interlaboratory comparison
        6.4.3 Set artifact interlaboratory comparison
        6.4.4 Set of homogeneous samples interlaboratory comparison
               (chemical)
   6.5 Traveling standards: selection and acquisition
        6.5.1 Selection
        6.5.2 Acquisition
   6.6 Instructions to participants
   6.7 Scheduling
7 Transportation
   7.1 Handling
   7.2 Packing
        7.2.1 Packing instructions
   7.3 Transportation guidelines
        7.3.1 National transportation
        7.3.2 International transportation
   7.4 Shipping costs
8 Participant documentation
   8.1 Measurement process documentation
   8.2 Overall measurement uncertainty
        8.2.1 Local measurement uncertainty
        8.2.2 ILC Pivot Laboratory measurement uncertainties
        8.2.3 Transportation uncertainties
9 Executing interlaboratory comparisons
   9.1 Staying on schedule
   9.2 Reference laboratory calibrations
10 Data analysis and reporting
   10.1 Data
        10.1.1 NIST Dataplot Software
        10.1.2 Rejection of observations or data
        10.1.3 Data retention
        10.1.4 Data analysis
   10.2 Preliminary report
   10.3 Final report
11 Bibliography
   11.1 ISO and ANSI publications
   11.2 Statistics, statistical process control, and measurement
        assurance
   11.3 Uncertainty analysis
   11.4 Interlaboratory comparisons
   11.5 Terminology
Appendix A Definitions
Appendix B Checklist for interlaboratory comparisons
Appendix C Example Certificate of Participation
Appendix D Example ILC Report