What does it mean to complete the entire design by adding a skylight? What stage is the design for the sunroof version at?

Simply put, it means completing the design without any relevant information

Isn’t that just taking off your pants to fart?

It’s not taking off one’s pants to fart, right? It depends on how you interpret that statement. The so-called skylight design refers to a \"standardized\" design that is carried out in the absence of specific clients or users – that is, without all the necessary data for design such as local hydrogeological and meteorological information, let alone project approvals or feasibility studies that serve as a basis for design. Such standardization allows for the rapid completion of construction drawings or detailed designs once a client is available; theoretically, it can significantly improve design efficiency, shorten the design timeline, and facilitate the promotion of the project. This approach is commonly used for new processes and technologies, or when adopting foreign process packages directly. It can be said that in the chemical engineering design industry, although such situations are not common, they do occur. As for the name, it’s the first time I’ve heard of it being called “opening the skylight.” In design institutes back in the 1990s, this was generally referred to as “standardized design,” but that term isn’t very accurate either; it’s just a common nickname. Since there is no design primary material, many professions do not require design work, as there is nothing to design. For example, in fields such as HVAC, fire protection, water supply and drainage, and general layout, only rough schematic diagrams can be prepared; in some projects, no such diagrams are even created. For specialties like civil structure, only a rough schematic of the factory building can be drawn – it’s impossible to create diagrams for equipment foundations, as no relevant data is available, and thus nothing can be done without it. The more complex areas are the main specialties of process engineering, equipment, piping, automatic control, and electrical engineering. In particular, for process engineering and equipment, PID diagrams are required, as well as assembly drawings for the main equipment. The cost estimation specialty must also prepare an approximate budget. The piping specialty does not need to produce construction drawings, but PDMS modeling must still be completed. . . . In short, all relevant departments must complete all preparatory work for the construction drawing design; once the contract is signed and the client has given their approval, the design work can proceed immediately. I just don’t know if what the original poster meant by “opening a skylight” refers to this; it probably isn’t that different, but it’s the first time I’ve heard of this term.