01
Gate definition
State whether the trial evaluates tool function, filling, appearance, dimensions, assembly, process window or a later approval objective.
Evidence route
Written trial plan, gate criteria and named approver
Tool-trial governance
T0 and T1 sampling gates: define what each mould trial is allowed to prove.
Trial labels vary between programmes and suppliers. PartVerity defines the purpose, tool state, resin, process state, sample identity, evidence and named disposition authority for every trial instead of treating a T-number as automatic approval.
Decision premise
Trial question: what decision can this build support, and which open issues remain outside its evidence?
Engineering control
Six controls for traceable T0/T1 sampling
A trial is useful only when its configuration and expected decision are known before the press starts.
02
Tool configuration
Record tool revision, cavities, inserts, temporary steel, texture/polish, cooling, hot runner and known incomplete operations.
Evidence route
Tool-status sheet and dated configuration images
03
Material and process state
Identify exact resin/colour, drying, machine, settings, deviations and whether parameters are exploratory or controlled.
Evidence route
Material lot and trial process record
04
Sample genealogy
Mark samples by trial, cavity where relevant, time/shot range and post-processing so data cannot detach from configuration.
Evidence route
Sample ID map and retained/reference sample register
05
Evidence package
Collect defined dimensional, visual, functional and process observations with actual results and non-conformance status.
Evidence route
Trial report, ballooned results and issue log
06
Disposition and next gate
Separate information-only samples, conditional use, correction approval and production release; assign actions and retrial scope.
Evidence route
Signed disposition, action owners and next-trial plan
Decision matrix
Trial condition to permitted decision
T0/T1 terminology is not universal. The written programme definition governs.
| Trial condition | Useful decision | Not yet proven |
|---|---|---|
| Initial tool function | Can the tool operate and produce reviewable parts? | Stable dimensions or production repeatability |
| Exploratory process settings | Which issues are tool- versus process-sensitive? | Approved process window |
| Incomplete texture or steel | Geometry/flow learning within stated limits | Final appearance or locked dimensions |
| Dimensional sample build | Current cavity results against defined CTQs | Lot capability without repeat evidence |
| Post-correction retrial | Whether approved actions closed named issues | Unreviewed changes outside retrial scope |
Claim boundaries
Trial labels that need qualification
‘T1 approved’ is incomplete without the signed disposition scope.
Selected good samples do not represent the full trial run.
A dimensional report without tool, cavity and process identity is weak evidence.
Trial approval does not waive open cosmetic, functional or documentation issues.
Technical context
Use guidance to frame the review—not to replace project evidence.
External context for progressive sample stages. PartVerity treats every gate definition and release scope as project-specific.
EPower T0/T1/T2 sampling guide