Country & Protocol Variables
Results & Analysis
Total FTE Required
--
Total Monitoring Hours: --
Available Hours per CRA: --
Staffing Recommendations
Calculation Formula
FTE = (N × V × T) / (W × D × A)
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Optional Adjustments
Scenario Comparison
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About This Calculator
Methodology
This calculator uses the validated FTE estimation algorithm widely adopted in global CRO and pharmaceutical operations. It combines data-driven inputs with operational efficiency benchmarks to provide accurate staffing estimates.
Key Variables
- N: Number of active sites
- V: Monitoring visits per site
- T: Average time per visit (hours)
- W: Working hours per CRA per month
- D: Study duration (months)
- A: CRA availability factor (~0.8 typical)
Best Practices
- Round up FTE estimates for operational coverage
- Consider backup support and peak enrollment periods
- Adjust for country-specific travel requirements
- Account for CRA experience and training needs
- Review and update estimates as study progresses
Optimization Tips
- Implement Risk-Based Monitoring to reduce unnecessary visits
- Use centralized monitoring where appropriate
- Group sites geographically to minimize travel
- Leverage technology for remote SDV when possible
- Balance workload across CRAs to prevent burnout