AMC Conferance Ottawa 14. June 2001 UncertaintyManagement Johan Dovmark a Tool in RiskManagement

Flow and operations - TodayR&D Functional Req. GPS SpecProduction Manufactu- ring docu- mentation Production ComponentsQA+QC Part verification Type testing FTA, FMEA & Tolerance-stackup calculations etc. FR-Loop GPS-Loop

Decision base ! NNSupplier

Process Capability

Functional-characteristic LSLUSL Function 100 % 0 %

Capability difficult easy Functional need critical not critical Metrological focus Design target

$ T/20 Production costs Verification costs Total costs 2S U Costs

Optimum Uncertainty management Verification costs Production costs Total costs $ T/20 2S UTUT Verification costs Production costs Total costs $ T/20 2S UTUT Verification costs Production costs Total costs $ T/20 2S UTUT Time

Capability difficult easy Functional need critical not critical Metrological focus Design target

The 3. dimension Measurement uncertainty Small Large R&D focus Design target

R & D Future flow Functional Req. GPS Spec.Production Manufactu- ring docu- mentation Production ComponentsQA Part verification FTA, FMEA & Tolerance-stackup calculations etc. Functional parameters Capability Measurement uncertainty and cooperation Param. to be verified Type testing UTUT U corr. U spec. 1 U meas.1 U meas.2 FR-Loop GPS-Loop U spec. 2

Pareto’s Law: log N = log A + m log x Vilfredo Pareto (1897) The 80 / 20 - rule