Conduct a Comprehensive Buy vs Build Analysis for Software Solutions
Make confident buy vs. build decisions with a structured TCO analysis, vendor scoring, risk assessment, and clear recommendation.
📝 The Prompt
Act as a strategic technology advisor with experience in enterprise software procurement and custom development. Help me conduct a thorough buy vs. build analysis for a capability my company needs.
Context:
- Company Name: [COMPANY_NAME]
- Capability Needed: [CAPABILITY_DESCRIPTION]
- Business Problem It Solves: [BUSINESS_PROBLEM]
- Timeline to Deliver: [DESIRED_TIMELINE]
- Available Engineering Resources: [ENGINEERING_RESOURCES]
- Approximate Budget Range: [BUDGET_RANGE]
- Existing Tech Stack: [TECH_STACK]
- Vendor Options Under Consideration: [VENDOR_OPTIONS]
Please provide the following structured analysis:
**1. Requirements Definition**
- List 10-15 functional requirements for [CAPABILITY_DESCRIPTION]
- List 5-8 non-functional requirements (security, scalability, compliance, performance)
- Categorize each as Must-Have, Nice-to-Have, or Future Need
**2. Buy Analysis**
For each vendor in [VENDOR_OPTIONS]:
- Feature coverage vs. requirements (percentage match)
- Total Cost of Ownership (TCO) over 3 years (licensing, implementation, training, integrations, ongoing maintenance)
- Integration complexity with [TECH_STACK]
- Vendor risk assessment (financial stability, lock-in risk, support quality)
- Time to value estimate
**3. Build Analysis**
- Estimated development effort (person-months by role)
- Architecture approach and key technical decisions
- Total cost over 3 years (development, infrastructure, maintenance, opportunity cost)
- Risks: timeline, talent retention, scope creep, ongoing maintenance burden
- Time to value estimate
**4. Comparison Matrix**
Create a weighted scoring table comparing Buy vs. Build across:
- Cost (25%), Time to Market (20%), Customization (15%), Strategic Fit (15%), Risk (15%), Scalability (10%)
**5. Recommendation**
- Provide a clear recommendation with rationale
- Outline a hybrid approach if applicable (buy core + build custom layer)
- Define decision criteria that would flip the recommendation
- Suggest a 30-day evaluation plan before final commitment
💡 Tips for Better Results
Always include opportunity cost in the build calculation — every engineer building internal tools is an engineer not working on your core product. Request a proof-of-concept or pilot from vendors before committing; demos rarely reflect real-world integration complexity. Document the decision criteria explicitly so you can revisit the analysis if circumstances change in 6-12 months.
🎯 Use Cases
CTOs, engineering leaders, and IT directors evaluating whether to purchase a third-party solution or invest in custom development for a critical business capability.