If I was training for a marathon I would set numerical goals for how much I would run a week coming into it. If I am recovering from an injury that's even more the case.
Lately my son and I have been learning a martial arts form that has about 80 steps in it. There is a lot new about it for us: I've never done a two-person form or a weapons form before, and he's never trained in a form at all. You learn this kind of thing by breaking it up into pieces: so we have a burndown chart on the wall for it, which I think is a good motivation.
Most professional and highly adapted athletes are extremely quantitative about their training programs, much more so at the advanced stages than in the early stages. They just progress much slower because it takes more training for their bodies to continue adapting.
Athletics is incredibly quantitative- even for the most advanced and experienced athletes.
I try to go for macro metrics that at least let people understand what’s important, bur also not directly rewarding specific values or targets. An example is that I’m trying to promote data hygiene in my organization so we have some guidelines for how to clean data, where to store it, etc. We a general metric for “Who is reading our guidance” to at least see what pages are read. We have another for “who is versioning their data.”
I don’t have goals tied to specific numbers of readers or data repos, but do use it to at least make sure the material is available.
I’m still testing to see, but the problem with no metrics, I think, is that sometimes people will get astray without an outside source to help test and prioritize.
Analogy taken from Alan Watts - https://youtu.be/rBpaUICxEhk
I'd also posit that quantitative approach to business is also harmful. This path is taken by companies under stress of scaling - trying to find out a self organizing simple structure. The end result always turns out to be a siloed mess run by micromanagers and people "cheating" the system to satisfy some set of arbitrary metrics and the organization turning into a social laboratory full of instances of Goodhart's law and Cobra Effects.
https://en.m.wikipedia.org/wiki/Goodhart%27s_law https://en.m.wikipedia.org/wiki/Cobra_effect
I have yet to seen a successful implementation of it. Usually a Lean and System Thinking common sense look at the organization is sufficient to run a successful team or a company, but only so few are interested when quantitative (micromanaging) approach is so popular and sexy.
Lean and Functional Programming: https://youtu.be/5s55LA2Renc