When should you employ generalising, overfitting, and underfitting, and what exactly is the difference between these three methods?

make a DFD for the sales order management system. (NOTE: refer to the pic)  A Sales order management system is an information system that can track sales, customer information details, and real time process details. This IS system is good for CRM (customer relationship management) because with the feature of keeping track of customer details this can help the issues of the customer who needed inquiry due to certain issue with a faster response time. Describe their responsibility and liability to the system. Example: (1) a cashier posting orders and collecting payments and giving changes will have to responsible for likely shortage in collections; Accountabilities: Define the accountabilities associated with IS ownership. Specify who is accountable for project success, adherence to timelines, and achieving business objectives. Ownership Structure: Define the ownership structure, including primary stakeholders and decision-makers. Clarify roles such as project sponsors, project managers,…

What precisely is the purpose of formal methods? It is advised that at least four arguments be made in favor of using specifications while developing software.

Explain the differences between the various Semantics, when and why each is employed, and the benefits and drawbacks of each.