Zero One Infinity is an invaluable rule of thumb during requirements gathering. There are only three numbers: zero, one, and infinity or N or any arbitrary number you care to use. The point is, if something is possible, and there is any possible variation or duplication or repetition of it, then there will be essentially infinite instances of it. You might as well design and code for that.
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If somebody tells you something is impossible and will never happen (aka zero) then be suspicious.
If they tell you it’ll only ever be once, promise, then be suspicious.
If they tell you it’ll only ever be N, not more, nor less, then be suspicious.
Are you seeing a pattern forming here?
Written 2019-08-07.
John DeHope 