Phase II. Measure
Purpose:
This step is to measure the present level of selected CTQ to set up Base line, and is to select the improvement target and object of CTQ.
Activity STEP:
Step 4. Set up the plan of data collection -> Sampling plus factor, Setup of measuring plan, Inspection of measuring system
Step 5. Grasp of existing level -> Collection of Data, Grasp of existing level, Improvement object
Output:
Step 4. List of plus factor : Cause and Effect Diagram, or Logic Tree, Plan of measurement, Gage R&R
Step 5. Analysis result of process capability, Control chart : X_Bar R Chart or I Chart
Step 4 – Selection of plus factor
Purpose:
This step is to select plus factors for efficient measurement of CTQ, to set up the plan of it, and to inspect the reliability of system to be measured.
| Process |
Purpose |
Activity |
Tool |
Select
plus factor |
• To select plus factor for
efficient measurement of
CTQ |
- To select plus factor
- To review the factor-relation
of Y and X’s
- To define standard measurement |
- Cause and effect diagram
- Logic Tree
- X-Y Matrix |
Set up
measuring
plan |
• To set up hypothesis on
measuring target,
and its measuring plan |
- To set up measuring plan |
|
Inspect
measuring
system |
• To inspect reliability of
system to be measured |
- Gage R&R |
- Gage R&R |
Step 5 – Measure Present Level
Purpose:
This step is to output process capability index, to structure existing Base Line, and to set up improvement object of CTQ.
| Process |
Purpose |
Activity |
Tool |
Collect
data |
• To collect data
based on measurement plan |
- To collect data |
- Sampling |
Measure
the present
level |
• To structure existing
Base Line outputting
Z of Y |
- Measure Z Level |
- Process capability
- σ level
- DPMO,DPU |
Improvement
object |
• To set up improvement target
and object of Y |
- To set up improvement
object |
|
Structure existing Base Line outputting process capability index of Y
|
