Terminal Service Level Agreement (SLA)
Operational specifications, air-gap guarantees, reconciliation integrity commitments, and escalation timelines for IESCO Sub-Division workstations.
99.9% Local Batch Processing Availability
The IESCO Statement Maker standalone engine is designed to execute locally with zero cloud dependence for billing file extraction, CP-71/CP-72 parsing, and ledger generation. All Sub-Division computers operating with an active license guarantee uninterrupted batch statement crunching even during complete WAN / internet blackout windows.
Air-Gapped Node Zero-Egress Guarantee
Customer consumption history, meter serial numbers, billing amounts, and staff session data never leave the Sub-Division local machine. Cryptographic HMAC-SHA256 offline activation tokens allow completely disconnected operation for air-gapped billing terminals without requiring proxy exceptions or firewall openings.
WAPDA Schema Integrity & Arithmetic Precision
All arithmetic calculations for tariff slabs, FPC, NJ Surcharge, GST, PRA tax withholdings, and deferred arrears match the official WAPDA Computer Center billing specifications down to exact paisa rounding. Multi-threaded SQLite Write-Ahead Logging (WAL) ensures ACID transactions and crash immunity during unexpected power outages.
Software Lifecycle & 7-Day Version Enforcement Window
When a new production release is published by the central hub, field workstations receive a 7-day grace period to download and install updates. During this window, critical tariff formula changes and security patches are synchronized without interrupting active morning billing queues.