Because one cellular telephone conversation can disrupt the concentration of 30 engineers hours-deep into complicated debugging jobs, especially when it's one side of a lengthy dramatic argument. It takes each engineer about 15 minutes to recover concentration, in my estimation. So that's about 7.5 hours lost, or about a programmer day.
Concentration is precious and fragile. If you can know just one thing about managing programmers, please know that.
Concentration is precious and fragile. If you can know just one thing about managing programmers, please know that.