Standard software is appropriate when a workflow is common and well-covered by an established product. Custom software becomes interesting when workarounds, duplicate data entry and disconnected systems create lasting cost.
Strong reasons for custom development
- The process creates genuine competitive advantage.
- Several systems require deep integration.
- Standard products cannot model core business rules cleanly.
- Roles, data or workflows have special requirements.
- Manual work grows faster than the business.
Do not build everything yourself
Custom systems should still use proven services where appropriate: authentication, payment providers, email, cloud storage or established APIs. Custom development should focus on what is truly specific.
Incremental instead of big bang
A clearly scoped first product core reduces risk. Data models and architecture should allow extensions without implementing every possible future requirement upfront.