代写COMP201: Software Engineering I Assignment 1.1 (2024/2025)代做留学生SQL语言程序

COMP201: Software Engineering I

Assignment 1.1 (2024/2025)

(100% mark for Assignment 1.1 is 15% of COMP201 grade)

OBJECTIVE

This assignment is mainly about “Requirements Engineering” and will  consist of various stages to produce parts of a requirements document  for  a  given  scenario  based  on  a  “proposed  drink  machine  system” detailed on page 2.

Assignment number	1 of 2
Weighting	15 %
Assignment Circulated date provided to class	30/9/2024
Deadline Day & Date & Time
Submission Mode	Electronic submission on Canvas (pdf)

Learning outcome assessed	1.  Realise the problems in designing and building significant computer  systems 2.    Understand the need to design systems that fully meet the   requirements of the intended users 3.   Be able to apply these principles in practice
Submission necessary in order to satisfy Module requirements	No
Purpose of assessment           Marking criteria	To assess the students’ ability to analyse, generate and document user requirements   See end of document
Late Submission Penalty	Standard UoL Policy

Instructions

•    All tasks refer to the scenario outlined on page 4 so, before you begin, read the scenario carefully.

•    You may make some reasonable assumptions about how the system should work (without inventing new functionality).

•    There is no “right answer” to modelling a system, different solutions can be equally good.

•    It may be helpful to refer to the course textbooks “Software

Engineering”, Addison-Wesley, by I. Sommerville and “Using UML”, Addison-Wesley, by P. Stevens.

Task 1 (60%)

(20% for use-case diagram, 40% for use-case descriptions)

For this assignment limit your submission to 15 use-cases, and make sure each use-case provides value.

For example, “use the keypad” would not be a good use-case, “accept and validate coin” would be a good use-case.

The markers for this assignment will award marks to the first 15 use-cases.

Also you are expected to have use cases for all 3 domains of operation, customer, operator and engineer. You do NOT need to use a lot of includes or extension use cases to get good marks.

All tasks for this assignment refer to the given scenario “ proposed drink machine system” (overleaf on page 2).

Produce a UML use-case model (i.e., both a use-case diagram and use-case descriptions) include use-case descriptions that are within the scope of the system, but for this coursework ONLY include human actors. There are THREE actors to identify. Your uses cases are modelling interactions with the human users of the system.

For the use-case diagram part of the model, you may use any method to draw it, including a hand-drawn diagram or ArgoUML software (available on the departmental computers (click start and then type ArgoUml into the search box) or download free via the internet). The demonstrators will be able to help you with using this program.  There is also app.genmymodel.com which is easy to use and free online (for public projects), so it is convenient if you are not in the lab.

For the model diagram, if you find that using one diagram is not sufficient or becomes overly complex, feel free to produce multiple diagrams. This is encouraged if the diagram has become difficult to read. Keep all text easy to read and all fonts at least 14pt.

Please use the following template for your use case descriptions:

ID	Id if use case, example UC1
Actors	List of relevant Actors
Name	Short name for use case
Description	Description of purpose of use case
Pre-conditions	What must be true to allow use case to happen
Event flow	Line by line detailed events for the use case
Post-condition	Any changes to the systems internal state due to use case executing
Includes	Any use cases which   make up this use case
Extensions	Any optional use cases that are part of initial case
Triggers	What might trigger use case

Task 2 (20%)

Identify and list 10 non-functional verifiable requirements of the “ proposed  drink machine system” below, using the description of the scenario (you can make some assumptions about the system not detailed in the requirement description).

Each requirement must have an appropriate criterion so it can be verified. So, it needs to be possible to objectively test each requirement in your list.

Task 3 (20%)

Devise a coding scheme for the keypad based on the information on page 8 of this document. To gain maximum marks the coding scheme, should be complete, minimal and provide the correct hamming distance.

Proposed drinks machine Proposed drinks machine control system Your company has been commissioned to design a drinks vending machine which will be able to produce a range of hot beverages, for example Hot chocolate, standard coffee, flat white, cappuccino, tea and soup.  For tea and standard coffee only the user can pick with milk and/or sugar. All of these drinks are made by heating up water, then mixing it up in a mixing vessel, the mixture is then dispensed into a disposable cup, the user also has an option to use their own cup. After each drink is dispensed the mixing vessel is cleaned out by running hot water through it for a short amount of time. To do all this, the machine needs to be able to: Accept and validate coins and calculate the current value of the coins inserted Accept instructions to choose a particular drink recipe Heat up the water to the correct temperature then mix the drinks Dispenses and fill the disposable cups for the drinks The system has the following sensors, 1 cup out of stock sensor, 16 drink ingredients out of stock sensors, cash box full sensor, water temperature  sensor, door open sensor. The machine has a keypad on the front with a keypad as shown in Figure 1, this is used to make the drink selection and to control the engineer’s tests.    The machine also has an alphanumeric LED display.