I like that the author brings up all the different roles in a company and explains succinctly what each one does with the door.<p>This could be a good way to explain an industry or the roles within a company to newcomers.
I think all jobs have that component in many ways, though not all with the veneer of glamour. In my job, it's not doors. It's "I count things".<p>I'm probably something like a data scientist (my work precedes the popularization of that term) but I'm sort of merging of data/statistical analyst, report writer, occasional programmer, occasional ETL writer etc.<p>An extremely large amount of my work results in output that is a count of some measure or metric or whatever. It might be something that happened, things happening now, things that might happen. But a lot of it comes down to counts. I recently finished a month-long analysis of 10 years of data to validate potential operational changes. The result? Counts of what happened in the past, counts of what might happen if we make changes.<p>The list of questions I have to answer, and ask people, is as long as the "doors".<p>Most jobs are rarely as simple as they appear from the outside. On a novel project, it might take me a week to come up with a single number. I have had a few occasions where I have had to explain in a similar "doors" list why that is often the case. It often ends with me saying something like, "So I can get you a bad number in a day. I can get you something minimally usable in 3 days. Or I can get you the correct answer in a week."
If curious see also<p>2017 <a href="https://news.ycombinator.com/item?id=16021509" rel="nofollow">https://news.ycombinator.com/item?id=16021509</a>