When it comes to software development and software projects, a lot can happen in a week, which in my view is one of the best things about working with software.
Think about it: between Monday and Friday, you could build an entire system, wipe everything, and rebuild it again in a very short period of time, relative to being in the hardware business. This is especially true if your developers manage to achieve their creative flow state, also known as being "in the zone!"
Of course, gathering the requirements, designing, building, testing, and shipping an entire system week in and week out is not, and should not, be a realistic expectation in most contexts.
You will have stakeholders and users to engage with, and everyone needs time to engage and contribute to the overall goal. With that idea in mind, most organizations and people will think...