Nobody needs to tell an architect or construction worker that building a large structure is a complex project. Going from initial planning to opening day may require months or even years of intensive labor from a large team of workers. Each of the many tasks in the process requires a great deal of consideration, and likely some negotiation and bureaucracy, before it can be completed.
This includes the foundation of the project — or, more literally, the foundation of the structure. If you want to cast the concrete on the site itself, you need to work out the time and labor logistics on the fly. Any plans you do make may change without warning depending on unpredictable factors like inclement weather.
Luckily, there is another method of creating a concrete foundation that may be easier to plan and less intensive. Here is everything you need to know about precast concrete.