Why it matters
Without this, expense irregularities and missing receipts drive backlogs, causing payment delays, compliance risks, and disputes over allowances, especially when multiple sites or contractors operate simultaneously.
From design to safety
Design
AI aligns cost codes and policies
The system reads written scheme of investigation budgets, cost codes, allowance rules, subcontractor rates, perdiem caps, and site-specific wage scales to validate expense entries before entry submission and to prepare compliant initial budgets. It cross-checks against HER funder guidelines and project procurement schedules to ensure fundable items are flagged for audit review.
- timesheets
- subsistence
- mileage
- accommodation
Build
Data capture and workflow routing
It ingests field data from context sheets, payroll feeds, travel logs, and site attendance boards; it builds validated expense entries, routes through approvals, and creates standardized job-audit trails for each trench team.
- timesheets
- mileage
- accommodation
- subsistence
Operation
Real‑time expense validation
The AI monitors daily submissions, flags anomalies, cross-checks with attendance records and GPS logs, reconciles mileage with fuel logs, and updates payroll drafts and client reports with traceable item lines.
- timesheets
- subsistence
- mileage
- accommodation
Maintenance
Audit trail and calibration
It maintains an immutable audit log, recalibrates rule thresholds per policy updates, reconciles variances during post‑excavation analysis, and archives supporting receipts in a secure document store.
- timesheets
- mileage
- accommodation
- subsistence
Safety
Compliance and risk alerts
The system flags potential overspend, improper allowances, or non‑compliant accommodation arrangements to the qualified person for sign‑off, while logging safety‑related expenses for near-miss analysis and risk registers.
- timesheets
- subsistence
- mileage
- accommodation
Part by part
- 1
timesheets
- Watch for
- Discrepancies between logged hours and on-site activity or equipment usage patterns.
- AI action
- If mismatch detected, prompt supervisor review and auto-suggest corrective coding.
- 2
subsistence
- Watch for
- Inconsistent meal and daily allowance claims relative to site stops.
- AI action
- Flag outliers and trigger approval queue with supporting travel logs.
- 3
mileage
- Watch for
- Unlogged vehicle movements or unusual route lengths.
- AI action
- Flag for payroll validation and route justification.
- 4
accommodation
- Watch for
- Overlapping bookings or non-compliant lodging during potentially unsafe periods.
- AI action
- Notify compliance officer and reallocate funds as needed.
- 5
overtime
- Watch for
- Overtime claims that exceed site policy or shift patterns.
- AI action
- Auto-calculate overtime rates and request supervisor sign-off.
- 6
payroll
- Watch for
- Pay cycles misaligned with timesheet approvals or missing expense receipts.
- AI action
- Trigger payroll hold until verification completes.
Worked example
Excavation Ledger at Riverside Heights, 2.4 ha site, 2024–2025 periods
Illustrative scenario with sample data.
A development-led project requires accurate subsistence, mileage, and overtime costs across three trench teams, with multiple contractors and on-site welfare facilities.
Signal in
siteCode=RH2; week=2024-W34; hoursLogged=42; subsistence=150; mileage=120; accommodation=300; overtime=8; receipts=attached; approvals=pending; per diem rates=standard; vehicle IDs=V-231,V-334
System out
expenseDraft submitted; anomalies flagged; awaiting supervisor sign-off; payroll hold until receipts verified; audit trail indicates policy alignment and HER compatibility.
Human sign-off: Project manager reviews flagged items, approves compliant expenses, and forwards to client reporting; HER officer signs off on special allowances and archive deposition triggers.
How to roll it out
Phase 1
Weeks 1 to 4
Baseline data structures, policy mapping, and initial integration with payroll feeds.
Phase 2
Weeks 5 to 8
Automation expands to mileage, accommodation, and subsistence rule checks; audit trails established.
Phase 3
Weeks 9 onward
Full governance, client reporting, and post-excavation reconciliation integrated.
Where people stay in charge
- Decisions about what constitutes a compliant subsistence claim must stay with a qualified person (site supervisor or client heritage officer) because policy interpretation varies by project.
- All payroll approvals and variances require an auditable trail showing justification and sign-off by the project manager or designated financial controller.
- Only data sources approved by the heritage and payroll teams may drive automatic payments to prevent misreporting.
Questions owners and crews ask
How does AI handle missing receipts for subsistence claims?
The system flags missing receipts, prompts submission of digital copies, and routes the case to the supervisor for justification before approval. It can request alternative evidence like contractor trip logs when appropriate.
Can we audit expense decisions against the written scheme of investigation?
Yes, the AI cross-checks expense allocations with budget lines and policy constraints, generating an auditable provenance trail for HER submissions and providing drill-down summaries for audit.
Who approves overtime and travel reimbursements in the field?
The site supervisor or project manager reviews flagged items and signs off before payroll processing; backup approvals may be requested from the client heritage consultant for critical projects.
How does the system protect personal data and confidentiality?
Access controls restrict data visibility by role; audit logs record every access, modification, and approval event; encryption safeguards data at rest and during transmission.
Sources and further reading
- Chartered Institute for ArchaeologistsProfessional body guidance on Registered Organisation duties, practice standards, and keeping auditable professional records.
- CIfA: Standards and GuidanceStandards for excavation recording and the written scheme of investigation content expected by curators.
- GOV.UK: National Planning Policy FrameworkPlanning policy on heritage recording requirements that project funders and archaeological curators rely on.
- HSE: ConstructionGuidance on site welfare facilities, rest areas, and toilet provision for construction workers.
- Archaeology Data ServiceDigital archive deposition guidance, data standards, and OASIS records for archaeological project documentation.
- MOLA: ServicesCommercial archaeology services covering evaluation, excavation, and post-excavation reporting for client projects.
- Historic EnglandHistoric Environment Record guidance and planning advice on archaeological records and heritage conditions.
- Society for American ArchaeologyEthics principles on professional responsibility and accountability in archaeological decisions and oversight.