There is one question I rarely asked early in my career.

What happens after the machine finishes its job?

At first, I didn’t think it was an engineering question. My responsibility seemed simple: design the machine, make sure it worked, deliver it to the customer, and move on.

Over time, I realized that many machines have very different endings. Some are built for a single test and never used again. Some projects stop before the equipment has a chance to create real value. I’ve also seen customers purchase complete systems, only to use a small portion of what was originally designed.

Those experiences changed the way I think about engineering.

Today, I don’t see delivery as the end of a project. It’s only the beginning.

What matters afterwards? Can people actually use the machine? Does it fit naturally into their work? Is it reliable? Did it solve the problem it was built to solve? These questions are far more important than a successful acceptance test.

More importantly, they remind me of something I didn’t fully understand years ago:

Every design decision has consequences. Some of them only become visible years later.

If a machine is only expected to serve a short-term project, then it shouldn’t automatically be designed as if it will run for twenty years.

Instead, I try to make decisions that match its real purpose. Use standard components whenever possible. Reuse modules where it makes sense. Reduce unnecessary custom parts. Make future disassembly and replacement easier.

These choices aren’t about reducing quality. They’re about avoiding unnecessary waste before the machine is even built.

I’m not only thinking about materials. I’m thinking about engineering effort, manufacturing cost, maintenance, future modifications, and whether today’s work can continue creating value tomorrow.

The longer I work as an engineer, the more I believe our responsibility is not just to deliver a working machine, but to make thoughtful decisions throughout its entire life.

Before making an important design decision, I now try to ask myself one simple question:

Am I doing the right thing?