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Building a Defensible FTTx Business Case
A practical method for separating network coverage, take-up, construction cost, connection timing and scenario assumptions.
An FTTx business case can look highly precise while depending on assumptions that have never been tested. Take-up, construction cost, connection timing and the pace of rollout usually have more influence on the result than the presentation quality of the spreadsheet.
Why this matters
Premises passed are not the same as paying connections. Civil works may be incurred well before customer revenue, and different neighbourhoods can have very different construction and adoption profiles.
The ITU ICT Infrastructure Business Planning Toolkit provides a structured methodology for assessing demand, revenues, capex, opex, financing and project value. Its strongest contribution is making the assumptions visible enough to test.
Controls that should be defined
- Separate premises passed, serviceable premises and active connections.
- Distinguish shared network cost from connection-specific cost.
- Use base, downside and upside scenarios for take-up and timing.
- Link revenue recognition to realistic construction and activation milestones.
- Identify which inputs come from field evidence and which are benchmarks.
A practical workflow
- Segment the target area by density, route condition and customer type.
- Estimate demand and adoption separately for each meaningful segment.
- Build the network design and cost model using traceable quantities.
- Test timing, take-up, cost and financing assumptions under alternative scenarios.
- Define stage gates for validating assumptions before each expansion decision.
Evidence to retain
Retain survey quantities, unit-rate sources, demand research, benchmark dates, scenario definitions, decision thresholds and the actual-versus-plan data used to recalibrate the model.
Conclusion
The purpose of a business case is not to produce one attractive forecast. It is to expose the conditions under which the investment works and the evidence needed before more capital is committed.