Procurement, inventory and warranty: one chain from supplier to roof
Link purchase orders to the BOM, gate crews on material, and carry the serial number from the supplier's invoice to the customer's roof.
- POs reference BOM lines; variance is flagged at creation.
- A material-ready gate prevents idle crew days.
- Scan serials at receipt and at installation; the match is your proof.
- Check equipment compliance before ordering.
- Start simple: an eight-column serial sheet beats none.
Quick answer
Make the quote BOM the spine of procurement: purchase orders reference BOM lines, any difference is flagged, and no crew is scheduled until material is confirmed. Capture serial numbers at goods receipt and again at installation, and link them to the project, commissioning date and warranty term. The same chain supports subsidy uploads, warranty claims and O&M.
One chain, many uses
From supplier invoice to warranty claim
The controls
- BOM-linked POs with variance flags and a reason for every difference.
- Supplier lead-time register: promised against actual dates, used in quotes.
- Material-ready gate before scheduling.
- Compliance before ordering: equipment lists change; check before purchase. See the reported ALMM List-II date in PM Surya Ghar for EPCs.
- Serials twice: at receipt and at installation.
- Warranty terms recorded from supplier documents, with expiry.
An illustrative idle-crew example with assumed numbers is in BOM control.
Where to go deeper
Do this first
For your next three projects, record every serial in one table and add a “material ready” check before the crew is booked.
Next: field operations, O&M and adoption. Back to start here.
Our own operating model. The ALMM reference is as reported in the linked article. Warranty terms vary by manufacturer and are not stated.
More by GarunaCDX
Keep going with the next handbook.
Chapter-by-chapter guides from the engineers who build these systems for clients.
