Use CAPP when the plan needs organising
CAPP belongs to digital manufacturing software. It helps organise process-plan data: operations, their sequence, input information and the way agreed details are handed between preparation and production. It is useful when the production route has already been agreed and the priority is clear preparation, version control or transfer of information into further work. CAPP does not replace a CAM programme, postprocessor, NC code or simulation, even where it works alongside these elements of the digital chain. Nor is it process consultation or an automatic response to a problem found during machining. If there is no answer to which operation should happen first, how the workpiece should be located or how the tool reaches the feature, organising data alone does not resolve the constraint.
Consult process design when the production route needs assessment
Process-design consultation is needed when the workpiece requirements, material, machine access, cutting tool, toolholding system, workholding system and programme strategy do not yet form a coherent arrangement. The question then concerns sequence, division of operations, datum location, support, clamping, access or trial conditions, rather than merely recording the plan in a system. The cutting tool, toolholding and workholding are separate parts of that arrangement. Toolholding means the connection between the tool and the spindle or turret. Workholding means locating, supporting and clamping the workpiece. Programme strategy describes how the operation is carried out. None of these becomes CAPP simply because its data may later be organised in a process plan.
Collect the information that shows where the decision is needed
The first description should name the workpiece, material, feature to be made, operation sequence and what remains uncertain or constrains the process today. State the machine and control, the approach to the feature, the current tool and relevant toolholding and workholding elements. Where a process plan or CAPP data already exists, identify which parts have been agreed and which still need assessment. There is no need to prepare a complete solution before the discussion. A brief account of the difference between the expected state and the observation helps distinguish organisation of an approved plan in CAPP from assessment of the production route itself. For digital data, also keep a question about CAM, a postprocessor, NC or simulation distinct from a question about the process on the machine.
Agree what the outcome must confirm
The outcome may be an organised scope of data for CAPP or a record of a decision that needs the process arrangement to be checked. If a change is to enter production, state what will be verified: documentation, programme, simulation, a trial on the machine or missing information. An honest data-gap flag is more appropriate than stating that a plan will work without assessment in the actual arrangement. Further work is neither a public form nor a promise of automated planning. Material for further organisation can be taken through Enter TIZ B2B. Only after the boundary between CAPP, the tool, holding and process design is clear can the appropriate stage be assigned.
What neither CAPP nor process consultation replaces
CAPP does not replace a selection decision about the cutting tool, toolholding system or workholding system. Process-design consultation is not the name for a software module or ready NC code. Both areas may be needed in the same work, but each requires its own data and method of checking. This boundary prevents a problem from being assigned to a system before the workpiece and its machining conditions have been described.