The definition of process control is fairly consistent. People use the term when they are talking about architectural issues. A large number of architectural issues are something that can be tied to a bathroom. An engineer can focus on the plumbing within a structure and if they want to truly understand that structure then they need to be able to understand process control.
Batch process controls can vary from situation to situation. You may want to use batch process control when you are working with a large number of raw materials. Raw materials are something that can be very helpful for someone that is building a home. Discrete process controls can even be tied to the definition of process control because it is associated with manufacturing.
Manufacturing and the building of homes can be related. You do want to make sure that the items you have purchased for a home have been packaged correctly. The packaging process can be very helpful.