how does a large scale automation project work?

In what order do they do a project tot minimize downtime on site? In school we used to write our software and test/"play around" with the hardeware simultaneously. I wonder how they do big scale projects?
 
evolves from a process or a piece of machinery that you need to control or monitor. It began with water mills, clocks, steam engines, and countless others
 
In large-scale projects, minimising downtime on site is crucial for efficiency and cost-effectiveness. The process typically follows a well-structured sequence. Initially, thorough planning and design are conducted, ensuring all aspects of the project are meticulously thought out. Next, pre-fabrication of components off-site is a common practice to reduce on-site assembly time. Simultaneously, the procurement of materials and equipment is initiated to have everything ready when needed. Once on-site, skilled teams focus on critical-path activities first, like foundations or structural elements, while parallel tasks, such as electrical and mechanical installations, are carried out in tandem. Rigorous testing and commissioning are interwoven with construction phases to identify and rectify issues early on. This orchestrated approach helps maintain a streamlined workflow, ensuring downtime is kept to a minimum and the project progresses efficiently.
 
For new installations, large-scale projects are integrated at the OEM facility. The use of standard components and standard code designs reduces the amount of time spent during integration. A much larger portion of time is spent with the process, ensuring the equipment is producing the correct product in the quoted time and efficiency. Once the customer is satisfied with the equipment, it is then installed at the customer's site and the evaluation process that occurred at the OEM facility is executed at the customer's facility.
 
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