control-plan

# Control Plan ## When to use Use this skill when: - Creating a new Control Plan for prototype, pre-launch, or production - Reviewing an existing Control Plan for completeness and accuracy - Updating the CP after a process change, corrective action (D7), or PFMEA update - Auditing a supplier's Control Plan during qualification or an IATF audit - Linking PFMEA controls to the Control Plan after FMEA review ## Prerequisites - Process Flow Diagram (required — CP must mirror the process flow sequence) - PFMEA (required — CP controls derive from PFMEA recommended actions) - Drawing with ballooned characteristics and tolerance data - List of special and significant characteristics (SC, CC, KPC, KCC) - MSA results for measurement systems referenced in the CP (for production CP) ## Workflow ### Step 1 — Determine the CP type | Type | When | Purpose | |------|------|---------| | **Prototype** | During prototype builds | Describes dimensional, material, and functional tests in prototype phase | | **Pre-launch** | After prototype, before PPAP | Describes controls in place during pilot/pre-production runs | | **Production** | After PPAP approval, at SOP | The living document — updated throughout product life | All three types may coexist during APQP phases. The Production CP is the one submitted as PPAP Element 7. ### Step 2 — Build the Control Plan structure The CP is a table with one row per characteristic per process step. Each row contains: **Header section (document-level...