Parameter controls in Tableau - Dashboard Guide

Dashboard Mode - Parameter controls

Business Question

How can we use a parameter control to dynamically change the sales target and see which products meet or exceed this target?

Sample Data

Product	Category	Sales
Chair	Furniture	250
Desk	Furniture	450
Pen	Office Supplies	150
Notebook	Office Supplies	300
Phone	Technology	600
Monitor	Technology	400

Dashboard Components

• KPI Card: Total Sales
  Formula: SUM([Sales])
  Result: 2150
• Parameter Control: Sales Target
  Type: Integer slider from 100 to 700, default 400
• Calculated Field: Meets Target
  Formula: IF [Sales] >= [Sales Target] THEN "Yes" ELSE "No" END
• Bar Chart: Sales by Product
  Color: Green if Meets Target = 'Yes', Red if 'No'
  Shows each product's sales with color indicating if it meets the target
• Table: Product Sales and Target Status
  Columns: Product, Sales, Meets Target

Dashboard Layout

+----------------------+-----------------------+
|      KPI Card        |    Parameter Control   |
|   Total Sales: 2150  |  Sales Target Slider   |
+----------------------+-----------------------+
|               Bar Chart: Sales by Product       |
|  (Colored bars showing if sales meet target)   |
+------------------------------------------------+
|       Table: Product Sales and Target Status    |
+------------------------------------------------+

Interactivity

The Sales Target parameter control lets the user pick a sales target number.

The Meets Target calculated field uses this parameter to check each product's sales.

The Bar Chart colors bars green or red based on whether sales meet the target.

The Table updates to show which products meet or do not meet the selected sales target.

Self Check

If you change the Sales Target parameter to 500, which products will show as meeting the target?

Answer: Only Phone with sales 600 meets the target; others show 'No'.

Key Result

Dashboard showing total sales and dynamically highlighting products meeting a user-selected sales target using a parameter control.

Practice

1. What is the main purpose of a parameter control in Tableau dashboards?

easy

A. To export data to Excel

B. To permanently change the data source

C. To create new data tables

D. To let users select values that dynamically change the view

Solution

1. Step 1: Understand parameter control function

   Parameter controls allow users to pick values that affect dashboard visuals dynamically.

2. Step 2: Compare options to this function

   Only To let users select values that dynamically change the view describes this dynamic user interaction; others describe unrelated actions.

3. Final Answer:

   To let users select values that dynamically change the view -> Option D

4. Quick Check:

   Parameter control = dynamic user input [OK]

Hint: Parameters let users pick values to change views [OK]

Common Mistakes:

• Thinking parameters change data source permanently
• Confusing parameters with filters that remove data
• Assuming parameters create new tables

2. Which of the following is the correct way to create a parameter control in Tableau?

easy

A. Drag a field to Rows shelf

B. Right-click in Data pane > Create > Parameter

C. Use Data > Export > Parameter

D. Right-click on a worksheet > Add Filter

Solution

1. Step 1: Recall how to create parameters

   In Tableau, parameters are created by right-clicking in the Data pane and selecting Create > Parameter.

2. Step 2: Eliminate incorrect options

   Dragging fields or exporting data does not create parameters; adding filters is different from parameters.

3. Final Answer:

   Right-click in Data pane > Create > Parameter -> Option B

4. Quick Check:

   Create parameter = Data pane right-click [OK]

Hint: Create parameters via Data pane right-click [OK]

Common Mistakes:

• Trying to create parameters from worksheet menus
• Confusing filters with parameters
• Looking for parameters in export options

3. Given a parameter Selected Year with values 2019, 2020, 2021, and a calculated field Sales for Year defined as IF [Year] = [Selected Year] THEN [Sales] ELSE 0 END, what happens when the user sets the parameter to 2020?

medium

A. All sales values are shown regardless of year

B. Sales values for 2019 are shown

C. Sales values for 2020 are shown; others are zero

D. The dashboard crashes due to syntax error

Solution

1. Step 1: Understand the calculated field logic

   The field returns sales only if the data's Year matches the parameter value; otherwise zero.

2. Step 2: Apply parameter value 2020

   When parameter is 2020, only sales for 2020 show; others become zero.

3. Final Answer:

   Sales values for 2020 are shown; others are zero -> Option C

4. Quick Check:

   Parameter filters sales by year = 2020 [OK]

Hint: Parameter filters data by matching values [OK]

Common Mistakes:

• Assuming all sales show regardless of parameter
• Confusing parameter with filter that removes rows
• Thinking syntax error occurs

4. You created a parameter control but it does not appear on the dashboard. What is the most likely reason?

medium

A. You forgot to show the parameter control on the worksheet

B. The parameter has no values

C. The data source is disconnected

D. Parameters cannot be added to dashboards

Solution

1. Step 1: Check parameter visibility

   Parameters must be explicitly shown by right-clicking and selecting 'Show Parameter Control'.

2. Step 2: Evaluate other options

   Parameters always have values when created; data source issues or dashboard restrictions do not hide parameters.

3. Final Answer:

   You forgot to show the parameter control on the worksheet -> Option A

4. Quick Check:

   Show parameter control to display it [OK]

Hint: Right-click parameter > Show Parameter Control to display [OK]

Common Mistakes:

• Assuming parameters show automatically
• Thinking parameters depend on data connection
• Believing parameters cannot be on dashboards

5. You want users to select a sales target from a list (10000, 20000, 30000) and highlight products exceeding that target. Which steps correctly implement this using parameter controls?

hard

A. Create a parameter with target values, create a calculated field comparing sales to parameter, then add the field to color on the view

B. Create a filter with target values, drag sales to rows, and add parameter to tooltip

C. Create a parameter with target values, export data, then manually highlight products

D. Create a calculated field with fixed sales, ignore parameter, and add to detail

Solution

1. Step 1: Create parameter with target values

   Define a parameter listing sales targets (10000, 20000, 30000) for user selection.

2. Step 2: Create calculated field comparing sales to parameter

   Use a formula like IF [Sales] > [Target Parameter] THEN 'Above Target' ELSE 'Below Target' END.

3. Step 3: Add calculated field to color on the view

   This colors products based on whether they exceed the selected target.

4. Final Answer:

   Create a parameter with target values, create a calculated field comparing sales to parameter, then add the field to color on the view -> Option A

5. Quick Check:

   Parameter + calc field + color = highlight [OK]

Hint: Use parameter + calc field + color to highlight dynamically [OK]

Common Mistakes:

• Using filters instead of parameters for dynamic input
• Exporting data instead of interactive highlighting
• Ignoring parameter in calculated field