Metrics / MTBF / CAPM

1. Metrics
 : measurement of software
 : software * software development process
 - Problems
  * coming up with good metrics is nowhere near as easy as you might expect
  * Access: there can be commercial confidence issues
  * Human: people don't like to think they are being watched
  * Lack of standardisation in software development process
 => Necessary to reach the higher levels of scales like CMM
  ( http://melancholy8914.blogspot.co.uk/2017/01/software-quality.html )

http://www.sqa.net/softwarequalitymetrics.html

2. MTBF (Mean Time Between Failure)
 - ((fails on average - repair time) / fails on average) * 100

http://whatis.techtarget.com/definition/MTBF-mean-time-between-failures

3. CAPM (Capital Asset Pricing Model)
 - The general idea is investors demand a return for two things: Time value of money / Risk
 - It divides risk into two distinct classes: "Controlled" and "Uncontrolled"
 - ra = rf + b(rm-rf)
   where b = a risk measure, rf = risk-free rate, rm = expected market return

http://www.investopedia.com/articles/06/capm.asp