Infrastructure Projects
Project Delivery: Consultant vs In-House
Whether consultant-led or in-house teams deliver capital projects more reliably and on budget is a question with direct value-for-money consequences that the data can answer.
Why Comparing Delivery Models Matters
Comparing cost overrun and completion outcomes between consultant-led and in-house capital projects tests whether outsourcing delivers the value-for-money it promises. This evidence supports the economy and efficiency dimensions of performance auditing and informs future delivery decisions. AuditPro Core compares the two delivery models on overrun and completion so the choice is grounded in outcomes rather than habit.
The Numbers
AuditPro Core renders this view from your tenant's live, tamper-evident records. The figures below are illustrative sample data.
Projects
142
Consultant-led
97
68%
Avg consultant overrun
21%
vs 11% in-house
Consultant fees
R 168 m
Overrun % by delivery model
Consultant-led overruns
| Project | Overrun % | Consultant fees |
|---|---|---|
| WWTW expansion | 34 | R 28 m |
| Ring road phase 2 | 27 | R 19 m |
| Sports complex | 23 | R 14 m |
Figures shown are illustrative sample data for demonstration. AuditPro Core renders these views from your own tenant's live, tamper-evident records.
Cost Overrun as a Value Signal
Cost overrun measures how far final cost exceeded the approved budget. Systematically higher overruns under one delivery model is a value-for-money signal worth investigating, not accepting.
Completion Reliability
On-time completion against the planned schedule indicates delivery reliability. A model that completes on budget but chronically late may still be failing service-delivery objectives.
Like-for-Like Comparison
Fair comparison controls for project size, complexity and risk. Consultants may carry the harder projects, so raw averages can mislead unless comparable projects are matched.
How AuditPro Core Bridges the Gap
- Comparative analysis: overrun and completion outcomes are compared across consultant-led and in-house projects.
- Exception workflow: projects with significant overruns are flagged for value-for-money review.
- Traceability to source: each outcome links to the project budget, contract and completion records.
- Audit-ready output: the comparison supports performance-audit conclusions on economy and efficiency.
Key Takeaways
- Cost overrun by delivery model is a direct value-for-money signal.
- Completion reliability matters alongside cost discipline.
- Control for size and complexity to avoid misleading comparisons.
- Evidence-based comparison should inform future delivery-model choices.
See This on Your Own Data
AuditPro Core renders this dashboard from your tenant's live, tamper-evident records — every figure traceable to source.