There are many services out there, so many.
Currently working on a commercial build construction site, let me tell you know that there is some serious amount of services going into this place. Some you would know, others you would have forgotten about and others you question heavily because you have no idea,
From mechanical, hydraulic, electrical, fire, to lifts to name only but a few of them. Many hands of work go into making these services happen and making them work within the build. There is much amazement if you truly take in what they are achieving.
When all together it makes the building operate in its efficiency of best possible state, and of course correct function. When they are out of alignment or there is one thing wrong, because of the complexity it can make for difficult and stressful times.