Project Change Orders & Subcontractor Cost Management

In contracting, construction, engineering, and enterprise consulting, initial project contracts rarely remain static. Unforeseen site conditions, client scope additions, and engineering revisions require formal contractual variations. Simultaneously, managing specialized subcontractors requires strict verification of milestone deliverables, retention money withholdings, and back-to-back cost recovery.

BIZA provides comprehensive Change Order Management (/projects/:id/change-orders) and Subcontractor Administration (/subcontractors) tools designed to protect project gross margins and eliminate unapproved scope creep.

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1. Project Change Orders (Variation Orders)

When a client or site supervisor requests an adjustment to original deliverables, BIZA formalizes the change through a structured variation workflow:

Key Change Order Attributes

• Scope Definition & Technical Justification: Detailed narrative describing the architectural, mechanical, or functional revisions requested.
• Cost & Price Impact:
  • Direct Cost Impact: Additional labor hours, specialized equipment rentals, raw material requisitions, and subcontractor fees.
  • Client Billing Adjustment: Revised contract price, profit markup, and revised billing milestone schedules.
• Schedule Impact: Additional working days or adjusted project completion deadlines.

Formal Approval Gate

• Change orders remain in Draft / Submitted status until approved by authorized stakeholders (Project Director, Client Representative).
• Upon approval, BIZA automatically updates the project's Revised Contract Value, Baseline Budget, and downstream milestone billing schedules. Unapproved variation orders cannot generate customer invoices.

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2. Subcontractor Work Orders & Milestone Certifications

Managing third-party trade subcontractors (e.g., electrical, plumbing, civil foundations, software engineering) requires strict verification before disbursement:

1. Subcontractor Agreements: Define subcontractor trade specializations, agreed unit rates, milestone deliverables, and payment terms.
2. Work Completion Certifications: Site supervisors inspect and record actual physical progress (e.g., 40% civil works completed) before the subcontractor submits a payment claim.
3. Automated 3-Way Match: Subcontractor progress invoices are matched against the approved work order and supervisor site certification, preventing over-billing.

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3. Retention Money Withholding & Release

In contracting and construction, withholding a statutory or contractual retention percentage (typically 5% to 10%) protects against latent defects:

• Automated Retention Deduction: When a subcontractor invoice is processed, BIZA automatically deducts the configured retention percentage, booking the net amount to Accounts Payable and the withheld balance to a dedicated Retention Payable Liability Account (2050).
• Defect Liability Period (DLP) Tracking: Records the warranty and maintenance period (e.g., 12 months post-handover).
• Final Retention Release Voucher: Upon successful issuance of the Final Completion Certificate, BIZA generates a retention release payment voucher, releasing the retained funds back to the subcontractor.

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4. Back-to-Back Client Billing & Cost Recovery

Subcontractor costs and approved variation orders link directly to customer accounts:

• Cost Code Linkage: Every subcontractor timesheet, material purchase, and equipment rental is tagged with the specific project task and cost center.
• One-Click Milestone Invoicing: Approved change orders and certified subcontractor progress claims feed directly into BIZA's customer invoicing engine, enabling timely, transparent milestone billing with attached supporting documentation.