Fabrication & Machining
Metal fabrication workflow from design to finished component
ManufacturingLead Time
62.0h
Cycle Time
9.0h
Wait Time
53.0h
PCE
14.1%
Stages
7
Bottleneck
Dispatch
Value-Add vs Non-Value-Add
Value-Add (VA)
An activity is value-add if it meets all three criteria:
- The customer is willing to pay for it
- It transforms the product or service
- It is done right the first time
Examples: Assembly, diagnosis, treatment, coding, machining, testing
Non-Value-Add (NVA)
Activities that consume time or resources but don't add value from the customer's perspective:
- Waiting — queues, approvals, batching delays
- Transport — moving materials or information
- Motion — unnecessary movement of people
- Rework — correcting defects or errors
- Over-processing — doing more than required
Note: Some NVA is necessary (compliance, safety). Target unnecessary NVA first.
Process Timeline
Value-Add vs Non-Value-Add
Bottleneck Analysis
Stage Efficiency
| # | Stage | Cycle (h) | Wait (h) | VA | Resource | Defect % | Efficiency |
|---|---|---|---|---|---|---|---|
| 1 | Engineering Drawing Review | 1.0 | 8.0 | VA | Engineer | 5.0% | 11.1% |
| 2 | Material Cutting | 0.75 | 2.0 | VA | CNC Operator | 3.0% | 27.3% |
| 3 | Machining | 3.0 | 1.0 | VA | Machinist | 4.0% | 75.0% |
| 4 | Welding | 2.0 | 4.0 | VA | Welder | 6.0% | 33.3% |
| 5 | Surface Treatment | 1.5 | 12.0 | VA | Surface Tech | 3.0% | 11.1% |
| 6 | Final Inspection | 0.5 | 2.0 | VA | QC | 8.0% | 20.0% |
| 7 | Dispatch | 0.25 | 24.0 | NVA | Logistics | 1.0% | 1.0% |