Phase 03 of 08
Configuration & customisation
Typically 20-35% of total project cost. Configuration of standard ERP modules and any custom code or extensions. The single biggest cost-overrun line — almost every ERP project underestimates how much custom work is needed.
What's included
- Standard module configuration
- Custom fields, screens, workflows
- Custom reports and dashboards
- Business-logic extensions / scripts
- Forms and document templates
- Approval workflows and segregation-of-duties rules
Common overruns
- 'Out-of-box' processes that need substantial customisation to fit how the business actually runs
- Late-breaking compliance or regulatory requirements
- Custom code that breaks at each platform upgrade
Basis
Digital Signet allocation model. Panorama 2026 names 'unexpected need for additional technology' as the top cause of cost overruns.
Reviewed 2026-09-04
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