Hi,

What tool is utilised in the DMAIC framework during the Measure and Analyse phases for project selection in the assembly process?

 

"Wrong Orientation of child part fitment while assembly to meeting part"  

 

Pl find the attached image of defect observed in assembly

 

 

Hi Kapil,

Great question — and the example images make the issue very clear.

For a defect like wrong orientation of a child part during assembly, the Measure and Analyze phases of DMAIC rely on a combination of quantification tools and root-cause exploration tools. The most appropriate ones for this scenario are:

✔ Measure Phase Tools

1. Operational Definition Sheet
   – Clearly defines what is “correct orientation” vs. “incorrect orientation” to ensure consistent measurement.

2. Defect Data Collection Sheet / Check Sheet
   – Helps capture how often the wrong orientation happens, on which stations, shifts, operators, or models.

3. Process Mapping / Detailed Assembly Flow Diagram
   – Identifies exactly where orientation decisions or manual steps occur.

4. Gauge R&R (if visual inspection is used)
   – Ensures inspectors/operators consistently identify orientation defects.

✔ Analyze Phase Tools

1. Cause-and-Effect (Fishbone) Diagram
   – For exploring potential causes like fixture design, operator skill, part symmetry, lighting, Poka-Yoke absence, etc.

2. 5 Why Analysis
   – To drill down from “wrong orientation” to the true underlying cause (e.g., unclear visual cues, orientation not fool-proof, part symmetry causing confusion, etc.).

3. Process FMEA / Defect Mode Prioritization
   – Highlights high-risk steps in assembly where wrong orientation is likely.

4. Physical Inspection & Video Analysis
   – Reviewing real assembly motions reveals whether the issue is due to ergonomics, visibility, or part handling.

Summary

For project selection and deep understanding in DMAIC, the key tools here are Process Mapping, Check Sheets, Fishbone, and 5 Why — supported by Gemba observation and, if needed, Gauge R&R.

This combination will help quantify the problem and identify exactly why the child part is being fitted in the wrong orientation.