Start with scope
Explain cost components, calculation methods, assumptions, sensitivities and lifecycle value.
How we structure the research
- Choose the scope, period and currency
- Separate one-time and recurring costs
- Record a source and date for each input
- Test how changing an assumption affects the total
Choose suitable sources
Use official documentation, original research and relevant technical references. State versions, dates, units and important conditions alongside the claim. Manufacturer documentation can establish what that manufacturer specifies; broader claims may require independent evidence.
Distinguish evidence and illustration
Diagrams on the site may simplify a concept. They are illustrative, not test records, engineering drawings or certification evidence. Examples are not customer case studies unless clearly substantiated.
Keep uncertainty visible
Show assumptions and exceptions. Link to the source that supports a claim, and state when evidence is incomplete or conflicting.