Advanced Object-Oriented Analysis & DesignDiploma in ITYear 2 (2015/16) Semester 4 | Week 4 | | 3 hours | Moving into Design |

OBJECTIVES

The objective of this set of exercises is to learn: * the difference between analysis and design * the difference between logical and physical design * the difference between system and detailed design * the major concerns of system design * the characteristics of a good design * the need to make trade-offs in design.

ACTIVITIES

1. What are the advantages of separating the analysis and design phases of a system development project?

2. What are the advantages of separating the analysis and design activities of a system development project?

3. The NPCineplex system handles the booking of tickets at a movie theatre. For each of the elements below, determine if it represents analysis, logical design or physical design, and tick the corresponding box.

| | Analysis | LogicalDesign | PhysicalDesign | a. | The seat bookings are represented by a 2D array of Seats. | | | | b. | The seat bookings are stored in an SQL database. | | | | c. | Users choose the seats to be booked by tapping them on the touchscreen. | | | | d. | Customers can pay for their tickets by cash or credit card. | | | | e. | Customers can cancel their bookings up to 24 hours before the start of the movie, but they must pay a cancellation fee. | | | | f. | A movie session is specified by the movie title, date, time and theatre. | | | | g. | Customers can view their seat bookings online in html format. | | | |

4. What are design constraints?

5. Suppose you are building an educational game to teach basic mathematics to kindergarten children as an in-house project (IHP). What design constraints might you face when the designing the new system?

6. Suppose you are developing an e-Commerce website for a