Escalator Completed Before Finishing Date

In Michigan, when they're fixing the road, there's sometimes a sign that says, "Work to be completed by..." The work is NEVER completed by that date. Never.

In our MRT station, one of the escalators was out of business. It had a sign up that it would be completed by 28th of September. It wasn't. It was completed WAY before then! Like two weeks before that date!!!

It's unclear if this means that:
-in Singapore they're simply more realistic
-in Singapore they're simply WAY MORE productive and efficient
-in Singapore they put a date far off so that they APPEAR way more productive and efficient when they finish "early"...

I guess we'll never know.