Machine downtime is easier to observe and record. Due to this fact, the common methodology is to calculate machine downtime and subtract it from 100 to get the figure for machine uptime. Machine Downtime = (Number of seconds machine was down / Total number of seconds observed) *100 Machine Uptime = 100 – Machine Downtime

What is the Calculation for Machine Availability? Machine availability is calculated as: Availability = Run Time / Planned Production Time For example, if a machine runs for 8 hours, with 4 hours of downtime, during a 12-hour shift, then the availability for that machine is 66.6%.

How is machine uptime calculated? It is one of the easiest metrics to calculate, as demonstrated by the following formula: “Actual Uptime Minutes ÷ Planned Runtime Minutes × 100 = Production Uptime Percentage” “Sum of Uptime Periods ÷ Number of Uptime Periods = MTBF” “Sum of Downtime Periods ÷ Number of Downtime Periods = MTTR”

We calculate uptime using this formula: Uptime / (Uptime + Downtime) Uptime = 54 minutes. Downtime = 1 minute. Maintenance time = 5 minutes. Uptime percentage = 54 / (54 + 1) or 98.182% So time spent in maintenance doesn't count for you and it doesn't count against you, it just doesn't count.

The way to calculate uptime is easy to understand: take the number of seconds that your monitor was down (in a certain time frame), and divide this by the total number of seconds your monitor was being monitored during that time frame. As a result, you get the downtime percentage, which is then subtracted from 100% to get the uptime percentage.