title: How to create a scoring system using two variables
body: <p>I have an application (Node/Angular) that I'm creating where I'm trying to rank users based on overall performance across two metrics. There are two metrics used to track the users we are using are the following: </p>
  
  <ol>
  <li>Units Produced (ranges between 0 - 6000) </li>
  <li>Rate of production = [ Units Produced ] / [ Labor Hours ] (ranges between 0 - 100)</li>
  </ol>
  
  <p>However, ranking users explicitly by either of these variables doesn't make sense, because it creates some strange incentives/behaviors. </p>
  
  <p>For instance, it is possible to have a really high Rate of Production, but a super low number of total number of units produced by working really hard over a short period of time. Alternatively, you can have a very high number of Units Produced, but it may be due to the fact that they worked overtime, and thus were able to produce more units than anyone else just due to the fact that they had longer to work, and they could have a low Rate of Production.</p>
  
  <p>Does anyone have experience designing these types of scoring systems? How have you handled it?</p>