Idle Time per Technician:
How to Find the Hidden Labor Profit Leak in Excel

Idle Time per Technician Calculation Workflow

1. Set Up Your Export and Add Helper Columns

• Start with a basic time export that includes:
  
  • Work date
    
  • Technician name
    
  • Paid hours
    
  • PTO, Training, Meeting
    
  • Standby
    
  • Travel, Billable
    
• If you are adding calculated columns, place them on the far right (or far left) of the dataset, not in the middle.
  
  • This prevents column issues when pasting in future exports.

2. Calculate Idle Hours per Row

• Create a new column called Idle Hours.
  
• Idle Hours should be:
  
  • Paid Hours minus the sum of non-working and non-billable buckets.
    
• Use MAX() so you never return negative idle time:
  
  • If the result is negative, idle time should be 0.
    
• Structure:
  
  • MAX(0, Paid Hours – SUM(PTO + Training + Meeting) – SUM(Travel + Billable))
    
• Confirm the results:
  
  • You may see negative values in the raw calculation, but MAX() will convert them to 0.

3. Create a Weekday Column from the Work Date

• Add a new column called Weekday.
  
• Use the TEXT() function to convert the work date into a weekday name:
  
  • Full weekday: TEXT(WorkDate,”dddd”)
    
  • 3-letter weekday: TEXT(WorkDate,”ddd”)
    
• This will let you analyze idle time patterns by day of week.

4. Build the Heat Map Layout

• Create a unique list of technicians:
  
  • Use UNIQUE() on the Technician Name column.
    
  • Copy and paste values to remove the formula: Ctrl + C, then Ctrl + Shift + V.
    
• Add weekday headers across the top:
  
  • Type Monday and drag across to Sunday.
    
• Center-align your table for readability.

5. Calculate Average Idle Time by Technician and Weekday

• In the first heat map cell (Tech + Monday), use AVERAGEIFS():
  
  • Average range: Idle Hours column
    
  • Criteria 1: Technician Name column = Technician in your row label
    
  • Criteria 2: Weekday column = Weekday in your column header
    
• Lock references correctly so you can drag across and down:
  
  • Lock the dataset column references so they do not shift.
    
  • Lock the technician lookup so the name does not change as you drag left to right.
    
  • Lock the weekday header row so the weekday changes as you drag across, but not down.
    
• Drag the formula across Monday to Sunday, then down for all technicians.

6. Handle No-Data Days with IFERROR

• Some technicians may not have worked on certain days (like Sunday).
  
• Wrap your formula in IFERROR():
  
  • Return a blank (or “No Data”) instead of errors.
    
• Fill across and down again after adding IFERROR().

7. Add Technician Averages and Weekday Averages

• Technician Average
  
  • Copy your AVERAGEIFS formula and remove the weekday criteria.
    
  • This returns the average idle time per technician across all days.
    
• Weekday Average
  
  • Copy your AVERAGEIFS formula and remove the technician criteria.
    
  • This returns the average idle time across all technicians for each weekday.
    
• Format as numbers (example shortcut shown in the video: Ctrl + Shift + 1).

8. Apply Conditional Formatting to Create the Heat Map

• Highlight only Monday through Saturday (exclude Sunday if it is not a normal workday).
  
• Go to:
  
  • Home → Conditional Formatting → Color Scales
    
• Choose a scale where higher idle time shows as red (because higher idle time is worse).
  
• Apply the same formatting to:
  
  • The technician averages column
    
  • The weekday averages row

9. Add a Benchmark Line for Your Chart

• Create a benchmark value (example used: 1 hour).
  
• Build a benchmark column that references that single benchmark cell and repeats down the technician list:
  
  • In the cell below the benchmark: =CellAbove
    
  • Double-click to fill down.
    
• Format to the decimals you want (example shown: 3 decimals).

10. Build the Combo Chart with a Benchmark Line

• Select:
  
  • Technician names
    
  • Technician average idle time values
    
  • Benchmark values
    
• Insert a chart:
  
  • Insert → Recommended Charts (or Insert → Combo)
    
• Use a Combo Chart:
  
  • Idle Time as columns
    
  • Benchmark as a line
    
• Rename the chart title to: Idle Time by Technician
  
• Clean up formatting:
  
  • Reduce decimals (example shown: 1 decimal)
    
  • Adjust the benchmark line style (thickness, dashed line, etc.)
    
  • Add data labels to the columns
    
  • Format label decimals to 1 if needed

11. Calculate the Annual Dollar Value of Idle Time

• Sum total idle hours for the year.
  
• Multiply by your billable hourly rate (example shown: 100 or 150 per hour):
  
  • Total Idle Hours × Hourly Rate
    
• This gives a quick estimate of how much labor value is being left on the table annually.