To calculate the standard deviation of those numbers: 1  1. 2  Work out the Mean (the simple average of the numbers). 3  2. Then for each number: subtract the Mean and square the result.4  3. Then work out the mean of those squared differences.5  4. Take the square root of that and we are done!o calculate the standard deviation of those numbers: 1  1. 2  Work out the Mean (the simple average of the numbers). 3  2. Then for each number: subtract the Mean and square the result.
FBF = Flashback Friday. #FBF is an acronym primarily used on Instagram, Facebook, Twitter, and Tumblr that stands for Flashback Friday. Users typically use the tag on photos of moments in their past, like last yearâs vacation or a childhood friend.
MTBF tells us the most frequent failures within a process and MTTR tells us which are the most serious failures. MTBF means Medium Time Between Failures. MTBF is the medium time between each failure within a process, or in other words, the frequency of each failure. MTTR means Medium Time To Repair, thus the medium untill having repaired the failure. Within edinnÂ® M2, the server calculates the generic MTBF table (for all failures of each process), and the MTBF table depending on the actual active product (for failures when this determined product was active).