Software Engineering Methodologies Assignment 1 Due Date: Thu, Dec 19, 2017 – 16:00 Weighting: 20% Introduction: Consider that you have been appointed as a software engineer at a new company called “Holiday Homes”. The company maintains an online rental platform to enable customers to rent and lease short-term holiday houses, just like Airbnb. Each customer can be a guest (i.e., tenant) and/or a host (i.e., owner). To become a host, a customer needs to register with the system with authentication details (e.g., government document, phone number and e-mail) and upload the details of the property, including number of guests allowed, available facilities and the amount of daily rent. A customer can also register as a guest with authentication details. While renting a holiday home, guests are required to login with authentication details, mention the length of their stay including the number of accompanying guests, authorize a payment through credit card and send a request for booking. At this point, the rental platform verifies credit card information, charges the credit card and sends a confirmation to both host and guest. However, the rental platform continues to hold the money until the guest arrives and then leaves the property. After the departure of the guest, the rental platform deducts their service fees from the rent and forwards the rest to the host. As a software engineer in “Holiday Homes”, your job is to oversee the development of a real-time software required for this rental platform. Description: The Rental platform should work according to the following rules: Step-1: Both Hosts and Guests can register with authentication details Step-2: Hosts can upload property details (e.g., daily rent, available facilities and number of guests allowed) Step-3: Guests can enter the system after successful authentication Step-4: Guests can make booking request by indicating length of stay, number of accompanying guests and credit card information Step-5: Rental platform verifies and charges the credit card, and sends confirmation to both the host and the guest. Step-6: The rental platform holds the money until the guest arrives and later leaves the property. Step-7: The rental platform deducts the service fees and forwards the rest to the host after the guest departs. Your task is to do a Real-Time Structured Analysis for the Rental platform considering the aforementioned steps. You are to present your analysis including the following information: (Either at the end or beginning of every diagram 2 to 3 lines description is required) 1. An External Entity-Relationship Diagram (ERD) indicating relationships of the Rental platform and the other external entities in the system. (Note: only entities are required not attributes of an entities. For example, customer, property, document, database, bank etc might be entities. ) 2. Data and Control Flow Diagrams (DFD/CFDs) – to sufficient detail that only a single task is carried out by each process at the lowest level. You should show the control events that occur on the same diagrams. Use the real-time extensions for control flows etc. shown in the lecture notes. You need to determine when and where events will occur. For example, whenever a piece of data becomes available it may need a control event to let the system know that it is available. These events must be clearly shown in these DFD/CFD diagrams and then handled in the Control Specification (CSPEC). (Note: Level 0 or Context diagram, level 1 and 2 DFD with control flow is required.) Only draw ERD, context diagram and all level 1 diagram separately. 3. Process Specifications (Pspecs) – a psuedo-code or similar design language specification is required for each process at the lowest level. 4. Control Specifications (Cspec) – use combinational or sequential FSMs as required, presented in an appropriate format. The idea is that the Cspec will completely describe how each and every event or control flow is handled in the system. You need to provide both “Process Activation Table” and “State Machine Diagram”. (Note: Require in a table format like shown below that merge steps half step2, step 3 and half step 4) All Level 2 Diagrams (Please follow three columns for every level 2 diagrams i.e. for every diagram please write pseudocode and PAT) Process activation table (PAT) Pseudocode for it Draw state machine diagram separately from table. 5. A Data Dictionary is required to adequately describe each name or special term used in the analysis, which includes process names, data flow names, control flow names etc. If you think further information is required make reasonable assumptions and clearly state these in the submission. (Note: add explanation of every words use in diagram explain by at least 10 words that can be easily understood by everyone. For example, what is mean by registration, authentication in given context?) 6. Conclusion Submission Criteria: The assignment must be submitted electronically through Moodle in pdf format. Draw the diagram using any suitable graphic software, no handwritten diagrams will be accepted. Write a conclusion of the analysis in your own words. Marking Guide: Item Marks An External Entity-Relationship Diagram 4 Data and Control Flow Diagrams (DFD/CFDs) 4 Process specifications (Pspecs) 4 Control Specifications (Cspec) 4 Data Dictionary 3 Conclusion 1 Total 20
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