A defensible technology business case must address both implementation risk and measurable organizational value. Option D evaluates the reliability of the developer and the internal effort required to install, validate, document, support, and train users on the add-on. This is critical because a third-party tool that modifies or suppresses model warnings can affect model-health reporting, software stability, upgrade compatibility, and quality-control procedures. The BIM manager must understand those operational risks before approving enterprise deployment.

Option E identifies the actual user population and compares the cost of supplying that group against quantifiable benefits such as reduced review time, more consistent warning triage, lower coordination risk, and improved model-health oversight. Limiting the calculation to relevant users produces a credible return-on-investment assessment.

Option A incorrectly assumes that every employee requires a licence and training, which can substantially overstate deployment costs. Competitor adoption may provide market context, but it does not establish technical suitability or financial value for the firm. The language of training materials is a secondary deployment consideration rather than a primary business-case metric.

Together, D and E provide the necessary technical-risk, implementation-effort, cost, user-demand, productivity, and risk-reduction evidence for an informed approval decision.

Reference topics: Project technology assessment; add-on governance; business-case development; software validation; deployment planning; training requirements; return on investment; model-risk management.