Free, rigorous tools for every stage of the evaluation lifecycle — from sample size calculation to design selection. Built on 12+ years of field experience and the PRAXIS methodology.
Each tool is designed for real-world field conditions — not just textbook scenarios. Guided parameter selection for evaluators at any experience level.
Rigorous sample size estimation for 8 evaluation designs. Real-time calculation with guided parameter selection — click the recommended presets if you're unsure which values to use.
Answer 10 context questions about your programme and get scored recommendations across 16 evaluation designs — with trade-offs, validity threats, and justification for each.
Upload any .xlsx or .csv and get instant descriptive statistics, frequency distributions, Likert scale analysis, time series, OLS & logistic regression, cross-tabulations, and a formatted Word report. Zero data transmission.
298 indicators across 11 sectors with guided selector wizard, deep filtering, and results framework generator. Covers PEPFAR MER, Global Fund, Gavi, WHO 100 Core, SDG, SPHERE, and 8 more frameworks.
Interactive canvas for building evidence-mapped causal diagrams. Three-level assumption architecture, evidence taxonomy with strength/type/transferability, feedback loops, timeframes, and narrative theory documentation.
Input your Theory of Change. Get evaluation questions mapped to OECD-DAC criteria, with 155 indicators from PEPFAR MER, Global Fund, Gavi, WHO, and DHS/MICS. Export as formatted Excel, Word, or JSON.
Structured walk-through of programme logic clarity, data availability, stakeholder readiness, and attribution feasibility. Outputs a scored assessment with actionable recommendations before you commission.
Use the Design Advisor to justify your methodology choice. Run the Sample Size Calculator to include a defensible sample size in the TOR — not just “approximately 400 households.”
Calculate exact sample size for GAM/SAM with the right DEFF. Select between 30×30 cluster design or adapted EPI method based on your context.
Upload your .xlsx straight from KoBoToolbox. Get instant frequency tables, Likert scale breakdowns, cross-tabulations, and export a formatted Word report.
Input your context — budget, timeline, comparison group feasibility, programme complexity — and get a ranked list of designs with trade-offs.
Cross-check their proposed sample size against your own calculation. Verify the evaluation design fits the stated purpose. Catch methodological gaps early.
The Design Advisor specifically accounts for fragile and conflict-affected contexts — downranking designs that require stable access.
Every parameter has guided presets with contextual explanations. Junior staff can produce a defensible sample size calculation without understanding the underlying statistics.
These tools are powered by the same methodological framework behind PRAXIS — the open-source evaluation system used by M&E professionals worldwide.