Meaning
Formal administrative documents authorise modifications to an existing part design or tooling configuration. These engineering change orders function as the official record of the transition from one revision level to the next within a manufacturing environment. They ensure that all stakeholders including the moulder and the end customer agree on the scope and timing of the update.
Revision Control
Documentation of every modification prevents the accidental use of obsolete drawings or incorrect resin grades. When engineering change orders are issued, the plant manager must verify that the current production batch matches the active revision level in the enterprise resource planning system. This prevents the shipment of mixed revisions which could compromise the safety or function of the final product.
Physical Impact
Physical adjustments to the mould steel are often required to accommodate changes in part geometry or wall thickness. Engineering change orders specify whether the tool requires metal removal or the addition of an insert to meet the new design criteria. These modifications must be validated through a new sampling process to confirm that the changes did not introduce fresh defects like sink marks or warpage.
The process often includes a full dimensional layout of the modified features to prove the tool is capable of repeating the new geometry across all cavities.
Financial Recovery
Financial responsibility for the modifications is established through the negotiation of the change request. Because engineering change orders often involve major labor and machine downtime, the moulder typically bills the customer for the engineering time and the hardware updates. Clear tracking of these costs ensures that the project budget remains accurate throughout the product lifecycle.
