DMAIC: Measure

Robert Setaputra

Measure

The measure phase begins with the identification of the key process metrics.

Once the key process metrics have been specified, related process and customer data is collected.

Purpose of Measure Phase

To validate the data To help the team narrowing the range of

potential causes need to be investigated in Analyze phase.

Framework

Business Problem

Business Solution

Statistical Solution

Statistical Problem

Business Problem

Business Solution

Statistical Problem

Statistical Solution

Business Problem

Business Solution

Statistical Problem

Measurement

Measurement System Analysis

MSA is a study to determine the extent and acceptability of system measurement

5 PropertiesBiasnessStabilityLinearityRepeatabilityReproducibility

Gage R&R

Repeatability & Reproducibility (R&R) Repeatability

Variation that is due to the measurement device (same operator, same part, same device).

Within person variation. Reproducibility

Variation that is due to the measurement system (different operators, different parts, same device).

Between person variation

Gage R&R Study Design (Crossed Design) Select a set of representative parts. Select a group of operators to measure

the parts. Ask the operators to measure for each

part repeatedly.

Ex. 5 parts, 2 operators, and 4 replicates.

Gage R&R using Minitab

Gage R&R Run Chart Gage R&R Study (Crossed) – ANOVA Gage R&R Contribution

Exercise: Table 5.6 (p. 121)Table 19.6 (p. 617)