Parameters & Dynamic Controls

Reading Time: 8 Mins | Level: Beginner to Advanced

1. What is a Parameter in Tableau?

A Parameter is a dynamic workbook variable (number, date, or string) that replaces a constant value in calculations, filters, and reference lines.

Unlike filters (which are tied to existing data columns), parameters are global independent controls: $$ ext{Parameter Control} o ext{Calculated Field / Filter} o ext{Visual Change}$$

2. Classic Use Cases for Parameters

1. 1
   Dynamic Top N Filter: Allow end-users to type or slide how many top products they want to see (Top 5, Top 10, Top 25).
2. 2
   What-If Scenario Modeling: Test the impact of increasing discounts by $X\%$ or sales commissions by $Y\%$.
3. 3
   Dynamic Measure Switcher: A single dropdown allowing users to swap between viewing Sales, Profit, or Quantity on the same chart!