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Factory Home Questions

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Some questions on the requirements and the domain model of factory homes assignment.

In my opinion, the domain layer has an obvious rel missing. As a domain model is really at requirments gathering stage I can see this kind of thing happening.
But I am wondering if I add another rel or even a few more domain classes will I get the markers backs up?

The requirements mentioning interfacing with a modelling tool. Cool. however, I don't see this component in any of the use cases?
Have I misinterpreted requirements or is my confusion ok ;-) ?


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I've also doubts about the domain, maybe you could help me.

1. All the entities (house, wall, roof, etc) are products or House is Product and the others are components?
2. If the user adds a window to a house design, how the system knows in which wall it has to be added?

I think that all the entities are products and a product can have inner products (for example, a house have many walls, a wall has a window, etc). With this approach I don't need a lot of entities (wall, house, roof, etc), it's enough with the product entity. The BMD would be so easy that I think something is wrong...

For the second cuestion, in the UC-2, when the user adds a component (in my opinion a product), he has to specify in which product is going to be added (a roof inside a house, a window inside a wall, etc).

What do you think?

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