Like a lot of HR systems, the one at Initech had grown into a complicated mess of special cases, edge cases, and business rules that couldn't be explained but had to be followed.

Mark was assigned to a project to manage another one of those special cases: Initech had just sold one of its factories. Their HR system needed to retain information about the factory and its employees up until the point of the sale, but it also needed to be disconnected from some future processing- they certainly didn't want to send anybody any paychecks, for example. But not all processing. If an employee had started a health insurance claim before the factory was sold, they needed to keep that active in the system until it was completed (but also not allow the employee to file new claims).

It was going to be a lot of special processing, so Mark made a simple suggestion: "Why don't we add a 'sold' checkbox, or a 'decommissioned' flag, or something like that? We add that as a data-field to a factory, and then we know all employees associated with that factory go down a different processing path."

"Oh, we can't do that," Mark's boss, Harlan, countered. "It would be a new database field, changes to the factory edit screen, we'd have to document it for the users, probably add an 'are you sure' confirmation dialog, it's just too much work to do that and then also add all the special processing rules."

It was okay, though, because Harlan had a simpler solution. Just do the special processing rules. IF factory_id == 27 THEN doTheSoldFactoryStuff() ELSE doTheRegularFactoryStuff(). No changes to the database, no changes to any screens, they just had to go through thousands of lines of code, scattered across hundreds of different modules and individual programs, and jam that special branch in there, in the right spot.

"Right," Mark cautioned, "but the next time we sell a factory, we'll have to do this all over again. Whereas if we add the checkbox-"

"How often do you think we're going to be selling factories? It's fine," Harlan said.

The next six months were the tedious process of going through all the places in the software where the special branch needed to go. Of course, no one was precisely documenting this, no one was really concerning themselves with any minutae like a "clean commit history": patch the code, maybe add a comment, and move on with your day. And it's not the case that every place they were changing the code fit exactly that pattern of IF factory_id == 27; not every system used the same naming conventions, or even the same language.

It was a rough six months, but at the end of it, the factory was sold, the HR systems processed everything correctly, and management was happy with the end result. There was just one more thing…

"Welp," Harlan said as he called everyone in for the new project kickoff. "We've sold another factory, and I have a plan for how we're going to make that change, without needing to add any database fields or modify any UI elements."

As Camus said, "One must imagine Sisyphus happy," but Mark was significantly less happy. If Harlan had taken his input, this wouldn't be an IT task at all. As it was, Mark had a good sense of what the next six months of work was going to look like.

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