Length of Interview EstimatorPROOF Insights research operations
Quick startHow to create a survey LOI estimate
1. Add the questionnaire

Upload a Word, text, or PDF questionnaire.

2. Choose sample type

Select panel, client-provided, or mixed sample.

3. Generate and export

Create the LOI estimate and export Markdown or CSV.

Questionnaire Input

Choose Sample Type

Choose a sample type before generating the LOI estimate.

AdvancedTiming assumptions, benchmark model, and device adjustment

Panel sample only: Uses panel-standard respondent LOI.

Client-provided sample only: Shows the 1.2 client adjustment.

Mixed sample: Shows panel-standard and client-adjusted LOI.

Programmed LOI never receives the client multiplier.