The mathematics of team productivity
When it comes to growing the productivity of a software engineering team, I believe there are four basic types of engineers: Adders, Subtracters, Multipliers, and Dividers. I find this framework helpful during hiring as well as determining when to let someone go.
Adders are your standard, talented engineers. They learn and grow over time, striving to improve themselves and their code. They add to your team’s productivity by being team players and strivers of excellence.
Subtracters are your below average performers. They complete what is assigned to them, and perhaps even do good work from time to time, but they subtract from the overall productivity of the team. Subtracters write code that must be refactored later, don’t stay current, and generally aren’t passionate about software development. Subtracters can become adders given time and a culture of code reviews or pairing, but you
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