Formwork & Concrete Pour
Formwork fabrication, installation, concrete pour, strip, and clean cycle
ConstructionLead Time
325.0h
Cycle Time
57.0h
Wait Time
268.0h
PCE
16.9%
Stages
9
Bottleneck
Curing Period
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 | Formwork Design & Shop Drawings | 8.0 | 48.0 | VA | Engineer | 8.0% | 14.3% |
| 2 | Material Fabrication | 16.0 | 24.0 | VA | Formwork Carpenter | 5.0% | 40.0% |
| 3 | Steel Reinforcement Placement | 8.0 | 4.0 | VA | Steel Fixer | 6.0% | 66.7% |
| 4 | Formwork Installation | 12.0 | 2.0 | VA | Formwork Crew | 7.0% | 85.7% |
| 5 | Pre-Pour Inspection | 1.0 | 8.0 | VA | Inspector | 12.0% | 11.1% |
| 6 | Concrete Pour | 4.0 | 2.0 | VA | Concrete Crew | 4.0% | 66.7% |
| 7 | Curing Period | 0.0 | 168.0 | NVA | None | 2.0% | 0.0% |
| 8 | Formwork Strip | 6.0 | 4.0 | VA | Formwork Crew | 5.0% | 60.0% |
| 9 | Clean & Stack for Reuse | 2.0 | 8.0 | NVA | Labourer | 3.0% | 20.0% |