But I already wrote it
A few weeks ago, we set out to implement a feature that enabled back office users to set a new rate ahead of time. With our analyst and the involved user being out of the office for days, we had to solely rely on written requirements. Two of us skimmed the documents, but didn’t take the time to assure there wasn’t any ambiguity - it looked trivial really. I went back to what I was doing, while my colleague set out to implement this feature. Going over the implementation together the next day, he had built something a lot more advanced than I had anticipated. While I argued that this was a lot more than we needed, we agreed to wait for feedback from our analyst to return from her holiday.
When our analyst returned, she confirmed that the implementation did a lot more than we needed. I suggested removing what we didn’t really need. My colleague argued that he now already had put in the effort to write it, and we should just leave it as is.
I can relate to feeling good about freshly written code, but that shouldn’t stop you from throwing it away. Code is just a means to an end; the side product of creating a solution or learning about a problem. If you really can’t let go, treasure it in a gist.
In this particular scenario, one could argue that making the solution more advanced than it should be, isn’t strong enough of an argument to make a big deal out of it. We’re giving the users a little extra for free, right?
I cannot stress the importance of simplicity enough; to be simple is to be great, perfection is achieved not when there is nothing more to add, but when there’s is nothing left to take away, and all of that. Nobody likes bulky software. Nobody likes fighting complexity all day.
But by only considering the cost of initially writing it, you are also ignorant of the true cost of what appears to be a small little extra on the surface. Users, developers, designers and analysts alike have yet another thing to wrap their heads around. More code is not a good thing; more code to test, more code to maintain. Each feature, how small it may seem, needs to be taken into account when planning on new ones. Each feature, definitely an advanced one, makes the cost of training and support go up. The cost of implementing a feature is just a tiny portion of what it costs to support that feature through its entire lifetime.
Using this argument, I eventually succeeded in persuading my peer to dump the ballast. The real lesson for me however, is probably that how trivial it might have seemed, we could have ruled out any possible ambiguity in advance by using one of the various tools we have to our disposal; a smallish white board session or maybe pairing on some high level tests.