How to Choose a Custom Software Partner: The 7-Question Due Diligence Audit
Selecting the right software engineering vendor determines whether your project becomes an appreciating balance-sheet asset or an abandoned capital write-off. Evaluating agencies requires looking past polished sales decks to audit seven concrete operational criteria: written discovery deliverables, verifiable industrial references, transparent milestone pricing, unencumbered source code ownership, prototype delivery velocity (Week 2), structured SLA maintenance terms, and guaranteed exit portability.
The Cost of Choosing the Wrong Software Partner
Industry statistics show that over 50% of custom software projects exceed their initial budget by 200% or are completely abandoned before reaching production. The primary root cause is rarely technical incompetence; it is agency misalignment, ambiguous scope discovery, and deceptive sales practices.
To protect your company's capital and ensure delivery success, evaluate prospective development partners using this 7-Question Due Diligence Audit:
The 7-Question Vendor Evaluation Test
-
1. What Concrete Deliverables Are Produced During Discovery?
A professional engineering firm produces a 20+ page Process Specification Document, Entity-Relationship Database Schemas (ERD), User Flow Diagrams, and written Acceptance Criteria before writing code.
-
2. How Many Production Systems Have You Deployed in Our Vertical?
Generic web agencies lack understanding of industrial nuances (scrap tracking, FIFO lot allocation, hakediş progress billing). Demand callable references from clients in your specific industry.
-
3. Do You Publish Transparent Pricing Bands?
Firms that hide their pricing typically adjust quotes based on how much budget they believe they can extract. Transparent firms publish open investment ranges and step-based milestone budgets.
-
4. Who Owns 100% of the Source Code and Intellectual Property?
Ensure the contract legally assigns all source code, database architectures, and deployment keys to your company upon milestone payment, with zero proprietary framework lock-in.
-
5. When Will We Test the First Working Software Output?
Reject agencies that promise a "big bang" release after 6 months. Require a clickable, interactive UI prototype within Week 2 and the first live functional module in Weeks 4–6.
-
6. What Is Your Long-Term Maintenance & SLA Structure?
Verify that ongoing maintenance is priced predictably (15–20% of build cost annually) with defined P1/P2 response-time SLAs and dedicated monthly developer hours.
-
7. What Happens If We Choose to Part Ways in 2 Years?
The vendor must provide clean, unminified, well-documented codebases (TypeScript / Python) and containerized deployment scripts that any competent in-house or third-party engineering team can take over immediately.
Red Flag vs. Green Flag Audit Comparison
| Audit Dimension | Dangerous Red Flag (Walk Away) | KodDelta Professional Standard (Green Flag) |
|---|---|---|
| Scoping & Discovery | "No need for formal docs, we understand your idea" | Structured discovery specs, data models, and acceptance tests |
| Pricing Model | Vague monthly retainer with open-ended scope | Fixed milestone budgeting tied to verified working deliverables |
| Prototype Delivery | Static PowerPoint mockups after 2 months | Clickable interactive prototype deployed in staging in Week 2 |
| Source Code Rights | "We retain the core platform; you get a usage license" | 100% full IP assignment and Git repository access from Day 1 |
| Engineering Stack | Proprietary obscure closed-source CMS | Industry-standard open-source stack (TypeScript, Node, SQL) |
Technical Due Diligence: 4 Things Your Lead Engineer Should Audit
If you have an in-house technical lead or CTO, have them review the vendor's engineering practices:
- Version Control Discipline: Are code commits granular with descriptive messages, or do they dump massive unreviewed chunks?
- Automated CI/CD Pipelines: Are automated unit tests, linting, and staging deployments executed automatically on every pull request?
- Database Normalization: Are database schemas normalized with proper primary/foreign key indexes and foreign key constraints?
- Security Posture: Is there strict input sanitization, CSRF/XSS protection, and zero hardcoded API keys in client-side code?
Learn more about how KodDelta operates with complete transparency on our About Page, or explore our published Pricing Model.
İhtiyacınızı konuşalım.
Keşif görüşmesi ücretsizdir.