Why You Need to Know the Cost of Downtime

Even experienced operations leaders and maintenance managers can find it hard to put a full number on unplanned downtime. At first glance, it may look like just a few lost hours of production. But the ripple effects are real, and they often add up to more than the hours on the clock suggest. 

With a clearer picture of those costs, it's easier to build the case for investments in predictive tools, upgraded systems, or data-driven monitoring solutions and to make sure the impact of downtime doesn't get lost in the day-to-day. 

Quantifying downtime helps you:

  • Build stronger business cases for maintenance and reliability investments. 
  • Identify hidden costs that often go unreported. 
  • Communicate impact more effectively across the organization and help drive change. 

Our calculator helps you quickly estimate downtime costs, evaluate current expenses, and put numbers behind reliability initiatives. 

What is Included in Your Downtime Cost Estimate

HanAra's Maintenance Cost Calculator Worksheet guides you through major categories that contribute to downtime costs. Each one may seem manageable on its own, but when added together, the numbers tell a much bigger story.

1. Lost Production

  • Formula: Hourly output rate × downtime hours × value per output unit 
  • Factor in the cost of timing, too. For operations where output value shifts with real-time market conditions, downtime at the wrong moment can cost more than the hours themselves suggest.

2. Labor

  • Formula: Overtime hours × labor rate × number of techs 
  • Include administrative hours spent on rescheduling, replanning, or processing overtime approvals. 
  • If outside experts or specialists need to be called in, factor in their rates plus any travel time or fees.

3. Replacement or Repair

  • Formula: Parts + labor for emergency fixes 
  • Consider rush shipping fees, contractor charges, and expedited service rates. 

4. Delay Penalties or Interest

  • Formula: Penalty per day × missed days (or value of canceled orders) 
  • This also includes customer churn, strained relationships, or lost renewals.

5. Energy Waste

  • Formula: Energy rate × power draw (kW) × hours running × efficiency loss (%) 
  • Efficiency loss (%) = (Expected load efficiency − Diminished load efficiency) ÷ Expected load efficiency 
  • Don't forget energy required for idling systems or restarting systems. 

Want Help Analyzing Your Plant's Downtime?

Get in touch with our solution experts to download our Calculator Worksheet. Our team can walk you through it and help you: 

  • Put a number on downtime costs that don't always show up on standard reports. 
  • Build a stronger case for predictive maintenance, reliability upgrades, or historian tools. 

This tool is especially helpful if you're: 

  • Preparing a budget request for reliability initiatives. 
  • Evaluating the ROI of a new data historian like HanPrism. 
  • Comparing the impact of pattern recognition solutions such as HanPHI. 

Contact us to download the worksheet or set up a time to chat with our team. The more clearly you can quantify downtime, the easier it is to make the case for smarter investments.