Billing & change orders · MEP engineering
Invoice every milestone and collect on time.
The deliverable ships, but the milestone invoice waits two weeks and out-of-scope work proceeds with no signed authorization. AR ages past terms while the next phase is staffed.
The reality
Unbilled engineering is uncollected engineering.
The deliverable hits its milestone but the invoice doesn't go out for two weeks. A client emails an out-of-scope request, the team does the work, and no additional-service authorization ever gets signed. Receivables drift past terms, and nobody follows up until the cash flow report flags it at quarter end.
The operator owns billing end to end. It issues the milestone invoice the moment the deliverable is complete, documents additional services and routes the authorization for signature before the work proceeds, and runs collections on aging AR — so fee earned becomes fee collected.
How the operator runs billing & change orders
Invoice MEP-2241-07 · Milestone
issuing- CD milestone marked complete
- Invoice built from fee schedule
- Issued to owner same day
01Issue the milestone invoice
Detects the completed deliverable, builds the invoice against the contract fee schedule, and issues it the same day.
ASA-019 · Out of scope
authorizing- Owner reroute request logged
- Additional hours priced
- Authorization routed for signature
02Authorize additional services
Logs the out-of-scope request, prices it, and routes the additional-service authorization for signature before work starts.
AR · Aging
collecting- Invoice MEP-2188-05 paid — closed
- 30-day reminder sent on MEP-2241-06
- MEP-2207-04 at 52 days — follow-up sent
03Run collections to close
Tracks AR aging, follows up on past-due invoices, and closes each receivable against the deposited payment.
The outcome
−25% days outstanding on engineering invoices
Fees invoiced and collected on every milestone.
- Milestone invoices out the day the deliverable closes
- No additional-service work done without a signed authorization
- Aging receivables followed up before they go stale
Common questions
Billing & change orders
- What does the Billing & change orders operator do?
- The operator owns billing end to end. It issues the milestone invoice the moment the deliverable is complete, documents additional services and routes the authorization for signature before the work proceeds, and runs collections on aging AR — so fee earned becomes fee collected.
- What impact does the Billing & change orders operator have?
- −25% days outstanding on engineering invoices. Fees invoiced and collected on every milestone.
- How does the Billing & change orders operator work?
- Detects the completed deliverable, builds the invoice against the contract fee schedule, and issues it the same day. Logs the out-of-scope request, prices it, and routes the additional-service authorization for signature before work starts. Tracks AR aging, follows up on past-due invoices, and closes each receivable against the deposited payment.
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