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Case 7 · Invoice Contingency Delivery (T−2 → T−1)
This case covers an invoice contingency delivery plan. At T−2 days, the team confirmed that a large billing project might not be ready. Instead of accepting a missed billing date, we built an emergency T−1 invoice path so that about 6 million users could still be billed on time.
Tech Stack:
Oracle
PL/SQL
Shell Script
Batch Jobs
Monitoring & Audit
Focus:
Billing Continuity
Contingency Plan
Risk Control
Grey Release
Dashboard
Data refresh: By billing cycle (T−2 → T+1)
What you’re seeing: impact of the contingency path — invoice coverage, error rates, and timelines from T−2 assessment to T−1 go-live. The dashboard helps answer: “Did we really protect the billing date, and what risks are left?”
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How to read & interact
- Trace the T−2 → T−1 path: see when the risk was confirmed, how quickly contingency scripts were built, and when they went live.
- Check coverage and quality: compare invoices produced via the contingency path vs. the original plan — volume, error rate, and reconciliation results.
- Connect to risk: review how the contingency path turned a potential two-month delay into a 48-hour controlled delivery window.