Customization Process: A Six-Step Approach
The standard customization process for high and low voltage switchgear follows this path: requirements communication → technical proposal → drawing confirmation → manufacturing → factory testing → delivery and acceptance. Industry experts note that the “drawing confirmation” stage is critical;
proceeding to production without clear requirements or confirmed drawings leads to extremely high rework costs.
Each stage proceeds based on written confirmation.
The Six-Step Customization Process
- Step 1: Requirements Communication – Submit load parameters (current, voltage, capacity), operating environment, and functional requirements to create a requirements list;
- Step 2: Technical Proposal – The manufacturer provides a proposal (cabinet type, component list, protection configuration, primary/secondary schematics) including a price quote;
- Step 3: Drawing Confirmation – Review and sign off on primary and secondary wiring diagrams, cabinet layout drawings, and component selection tables item by item;
- Step 4: Manufacturing – Schedule production based on confirmed drawings; procure and assemble components;
- Step 5: Factory Testing – Insulation, withstand voltage, and functional integration tests;
Factory Acceptance Test (FAT) report generation; - Step 6: Delivery and Acceptance – On-site acceptance (checking against drawings and lists), installation and commissioning guidance, and warranty activation.
Key Control Points
First, quantifying requirements.
Convert vague concepts like “sufficient” into specific parameters to prevent misunderstandings.
Second, drawing confirmation. Sign off on primary and secondary schemes;
handle any changes via a formal written process. Third, locking in components.
Specify brands and models in the proposal to prevent downgrading.
Fourth, witnessing tests. Witness factory tests on-site or request the FAT report.
Fifth, acceptance standards.
Verify the product against drawings and the contract during acceptance;
reject any non-compliant items.
Pitfalls to Avoid
First, “production without drawings”—proceeding without confirming drawings carries a high risk of rework.
Second, “verbal changes”—failing to document changes in writing leads to disputes during acceptance.
Third, “component substitution”—ensure components match the finalized specifications and verify them against the checklist during acceptance.
Fourth, “missing tests”—the quality of custom equipment lacking a Factory Acceptance Test (FAT) report is questionable.
Trends and Recommendations
Customization processes are becoming digitized: BIM design, cloud-based drawing confirmation, and digital FAT reports enhance transparency and efficiency.
For purchasers, the recommended approach is: “quantify requirements, confirm drawings, lock in components, and witness testing.”
Customization is an art of process management—confirming every step ensures a reliable delivery.
