SE2: Software Design and Architecture - CS 446, CS 646, ECE 452: Sec 001, 002

Announcements

All Class announcements will be made here.

Spring 2021 (Term 1215)

SE2: Software Design and Architecture is the second course of the three software engineering capstone project courses, offered jointly by the David R. Cheriton School of Computer Science and the Department of Electrical and Computer Engineering at the University of Waterloo.

Recorded lectures, slides and the the notes will be posted in Learn on Monday and Wednesday by 10 AM (I will strive to upload them even before but if you look into Learn by 10 AM on Mon/Wed you should be able to see them).


Official administrative entry and outline.

Important dates and information will be posted here on this website. The official syllabus is also the contents on this website. You can reach this website from the corresponding entry in learn.uwaterloo.ca.

While the course does not have a required textbook, the following are good readings on this subject.

  • Richard N. Taylor, Nenad Medvidovic, and Eric Dashofy. Software Architecture. Foundations, Theory, and Practice. Slides for this book are available online.
  • Ian Gorton. Essential Software Architecture.
  • Fred P. Brooks Jr. The Mythical Man Month.
  • Fred P. Brooks Jr. The Design of Design.

Contact

This term we will be using Learn for class discussion. Rather than emailing questions to the teaching staff, I encourage you to post your questions on Learn.

If you need to ask a question regarding the grades or something personal then please email the instructor. Prefix the subject line with CS446/ECE452/CS646 for a prompt reply.

All TAs will be answering questions mostly only on Learn. If there is a specific need to actually talk to a TA, please email them to get a virtual meeting link that can be used. They have preferred times set up (below). Please try to schedule during these times as much as possible.

  • Yiwen Dong - yiwen.dong@uwaterloo.ca. Virtual office hours on Monday. 11 AM - 12 PM EST
  • Farshad Kazemi - f2kazemi@uwaterloo.ca. Virtual office hours on Tuesday 4 PM - 5 PM EST
  • Mehran Meidani - mmeidani@uwaterloo.ca. Virtual office hours on Wednesday 2 PM - 3 PM EST
  • Daniel Erhabor - derhabor@uwaterloo.ca. Virtual office hours on Thursday 12.30 PM - 01.30 PM EST
  • Instructor: Mei Nagappan - mei.nagappan@uwaterloo.ca. Virtual office hours on Friday 11 AM - 12 PM EST or by appointment

The class will use the Learn system for all submissions and grades. Once you are registered, you will be able to access learn and check the dropboxes for submissions and view your grades.

Course Schedule

DateTopicsNotes
May 10 Introduction to the Class, Expectations, Admin Slides, Video
May 12 Introduction to Software Architecture Slides, Video
May 17 Intro to building Android apps - Part 1 Video #1, Video #2, Video #3, Video #4
May 19 Intro to building Android apps - Part 2 Video #5, Video #6, Video #7, Video #8
May 24 Victoria Day. No Class.
May 26 Non-Functional Properties. Slides, Video
May 30 Human Values in Software Engineering Slides, Video
June 02 Project Scheduling Slides, Video
June 7 UML Intro Slides, Video
June 9 Architectural views & decomposition Slides, Video
June 14 Project Proposal Prep. No class.
June 16 Project Proposal Prep. No class.
June 21 Arch Styles Intro Slides, Video
June 23 Arch Styles - Part 1 Slides, Video
June 28 Arch Styles - Part 2 See Above.
June 30 Project Prototype Demo Prep. No Class
July 5 Design Patterns Introduction Slides, Video
July 7 Design Patterns - Part 1 Slides, Video
July 12 Design Patterns - Part 2 Slides, Video
July 14 Design Patterns - Part 3 Slides, Video
July 19 Release Engineering - Part 1 Slides, Video
July 21 Release Engineering - Continuous Experimentation Slides, Video
July 26 Project finalization Prep. No class.
July 28 Project finalization Prep. No class.
Aug 2 Civic Holiday
Aug 3 Evaluate final demo and choose best project
Aug 9 - 16 Oral Exam Week

Project

The project forms an integral part of this course. Here are some of the hard requirements:

  • The app should be implemented as a Native Android app (i.e., not built using an app builder or a framework like React/Node.js or HTML5).
  • The code should be hosted in Github as a private repository. You can choose to open source it after the class if you want. But during the time of the class it shall be private. You will need to add the following user as a collaborator with full privileges: uw-cs446-s21. This is github account for the instructor and TA.
  • The app should use at least 2 architectural styles and 2 design patterns that have been discussed in class.

The three goals of the project is to

  • produce a significant mobile app that performs some useful function
  • does not cause harm to any population of users
  • have a defensible design and architecture that can be presented to us explicitly

There are only three soft restrictions on the app idea itself: no database management apps will be accepted (e.g., simple CRUD apps that do not make sense in a mobile context); apps that require crowd buy-in are not acceptable (e.g., apps that would require large numbers of people to contribute content to be viably useful); apps that require a complex server infrastructure are also not acceptable. If your app has any of these components, then you are responsible to have the DB or server infrastructure or crowd set up so that you can demo the app and we can test it too.

If after the proposal, we feel that the app idea is too simple or too easy, then we will provide the team with a basic idea. The teams will then have to implement our suggested idea. We highly encourage the teams to come up with their own creative ideas. See below for some great ideas from the past.

Human values: In the proposal, you will detail the functional requirements, non-functional properties, and human values that your app addresses. You will also state who some of your stakeholders are and which population of users that your app is useful for.

Buddy team evaluation: You will receive the proposal of another team. Your goal is to look at the proposal and find out which populations could be harmed and what harm could be created by the features of the app. You are expected to think critically and come up with an exhaustive list. The instructor and TAs will also come up with a list. You are evaluated on how similar you are to our list.

Pivot: The lists of harm that exist in the app created by the instructor team and the buddy team will be shared with the team that proposed the project by the prototype demo stage. When you receive your list, you are expected to make changes in the project so that the harm is mitigated. This change has to be documented by the final demo and written deliverable.

The projects will be completed in teams of six. If it has less than six or more than six, you will need to explicitly get permission from the instructor. You should select your own team; if you do not have a team or your team has less than six members, please post on the appropriate Learn discussion thread.

All project grades taken together (D1, D2, D3, D6, D7) need not be the same for all team members. Each team member will get a score based on effort. Please only commit your personal contribution to the repository. Do not commit for another team member. Commits to the repo are an important signal to us. Additionally, projects will have a difficulty scale applied to them by the instructor and TAs. The scale formula will be:

(total score for the team member across all project deliverables D1, D2, D3, D6, D7 + bonus) * (scale/100) = final project grade
Scale will range between 0 and 100. The components of the scaling mark will be determined by:
  • 10: completeness (compared to proposal)
  • 10: utility
  • 10: polish
  • 10: difficulty
  • 10: pivot
  • 50: individual effort - will be based on peer evaluation and our assessment based on oral exam and github logs
There will also be two sources of bonus marks during the term; which will be worth 2%:
  • Best final demo - To two teams
  • Accepted to the Google Play Store - To any team that gets through
NOTE: The expectation is that you will work approximately 9 hours per week on this course; at least 6 of these hours should be on the project. Given that the course lasts 12 weeks, each team member is expected to work on the project at least 75 hours. As a team of six that will be 450 hours. You should be able to accomplish something pretty great in this time; please make the most of this opportunity.

Installing Android Studio

https://developer.android.com/studio/install

Use the above link to start installing Android Studio in Linux/Win/Mac Machines beforehand. The download size may vary based on the operating system/region and locale ( 800 MB ) for Android Studio alone. Always choose the latest version of Android Studio and corresponding Gradle plugin to build APK files, which helps in reviewing code and evaluation.

SDK Installation: Use the latest Stable Android Version for SDK Compilation rather than the beta version. The preferable version can be from Android M ( API 23 ) to Android R ( API 30 ). As soon as you install the Android Studio, start selecting the preferred android version ( at least 1 ) and download the corresponding emulator, SDK Library, SDK Build Tools, and other utilities. Kindly allocate around 20 GB physical space for Android Studio and SDK Installation and a stable internet connection to complete all the installation setup in advance.

Emulator vs. Android Phone: Kindly use Android Mobile phone for testing by connecting it via USB for debugging, which will have a low impact on system resources while building Android apps. Otherwise, kindly install x86 Google Play/Google API Supported Android emulator for instant access and testing. Do not install ARM or other arch types that are not optimized for cold startup/booting.

Reliable Network Connection: Kindly ensure about reliable network connection for downloading Android Studio and SDK Libraries. Additional data will be required while using third party libraries to build an application or while syncing via Gradle.

2017 Project Videos

A selection of project videos from 2017 are included in this playlist to help you get an idea of the scope of projects suitable for the course.

Quizzes and Assignments

In total, there will be nine quizzes.

The quizzes are to be completed individually and should take no more than 20 minutes if you have gone through the material. The quizzes will be posted by 10 AM on Thursday (potentially earlier) and will be due by the next day Friday at 5 PM.

Oral Exam Details

There will be no written finals in this course. Instead we will do an oral exam. Details are below:

  1. Sign up for meeting slot in the online sign up sheet . Make sure your whole team can attend.
  2. Meeting will be virtual and we will provide a meeting room here.
  3. The signup is first come, first served; please sign up using your team name.
  4. The slot is 60 minutes. You will start by giving a 10 minute oral description of your system’s architecture and design. You can screen share any material (slides/previous documents)
  5. The remainder of the slot will be used to discuss your architecture and design.
  6. Some questions will be for the group, others will be for specific individuals.
  7. Being able to clearly and unambiguously justify your architectural and design decisions will be fundamental to success here.
  8. Be prepared to defend your system’s design. We will also likely ask about how your design could adapt to specific given evolutionary constraints (e.g., ‘you must now support XYZ, how would you do that?’). This would involve knowing other similar styles or patterns.

Assessment Breakdown and Schedule

Most deliverables are due at 5 PM EST on the respective Friday. Late submissions will be graded only on a case-by-case basis.
Deliverable Date Format Value
Quiz 1 May 14 On Learn 3%
Project Team Selection May 21 On Learn No Grade
Quiz 2 May 21 On Learn 3%
Quiz 3 May 28 On Learn 3%
Quiz 4 June 4 On Learn 3%
Quiz 5 June 11 On Learn 3%
D1: Proposal Document June 18 Upload to Learn 5%
Quiz 6 June 25 On Learn 3%
D2: Buddy team's evaluation June 30 (Note: Wed instead of Fri) Upload to Learn 3%
D3: Prototype Document + Demo July 9 Upload to Learn 10%
Quiz 7 July 9 On Learn 3%
D4: Architecture Style Examples July 16 Upload to Learn 10%
Quiz 8 July 16 On Learn 3%
Quiz 9 July 23 On Learn 3%
D5: Design Pattern Examples July 23 Upload to Learn 10%
D6: Arch + Design Document Aug 4 (Note this is a Wed) Upload to Learn 10%
D7: Final Documentation + Video Aug 6 Upload to Learn 5%
Oral Exam Aug 9 - 14 Virtually 20%

Graduate Student Project

For graduate students only: in addition to the project and other assessments above, you will perform an individual graduate project. The graduate project is worth 25% of your grade; your final grade will be calculated by scaling down the above assessments from 100% to 75%.

Three types of graduate projects are possible:

  1. Build a Software Tool:

    The goal of this style of project is to identify some problem developers encounter in practice, find some solution, and validate that the solution helps with the initial problem. I would recommend drawing upon your experience as you write code to identify some problem that has inhibited you in the past and fix it.

    The outcome of this project will be a short (5-6 page) paper describing the problem, your solution, a comparison to related approaches, and some form of validation.

  2. Literature Survey:

    The goal of this kind of project is to gain a more complete understanding of a topic relevant to this course. The outcome of this project will be a critical summary of the state-of-the-art on your selected topic; this summary should be 8-10 pages. It is essential that this summary synthesizes the surveyed literature to identify important themes, findings, and open questions.

  3. Use an Advanced Software Development Tool

    The goal of this project is to provide a validation of some previously-existing development tool from the research community. The tool you validate must be related to the course material. The outcome of this project will be a 6-8 page paper describing your experience with the tool outlining its strengths, weaknesses, and avenues for future improvement.

There are two deliverables for the graduate project:

  1. Project proposal. Before you undertake your project you will need to submit a proposal for approval. The proposal should be short (1-2 pages in ACM format). The proposal should include a problem statement, the motivation for the project, a set of objectives you aim to accomplish, and a set of milestones. I will read these and provide comments. The proposal is not for marks but must be completed in order to pass the course. This will be due on May 31 via email to me.
  2. Written report. The required length of the written report varies from project to project; all reports must be formatted according to the ACM format and submitted as a PDF. This artifact will constitute 100% of the graduate project grade. This will be due on Aug 02 via email to me.

Nominal Course Outline

This is the high-level outline provided by the department; while this is general guideline the course will be adjusted according to your feedback, interests, and experience.

Introduction (1h)

Why design? Input, output, and constraints of the design process. Types of design. Relationship to software quality and evolution. Design in more mature implementation technologies.

Software Design Process Models (3h)

Design as search. Design spaces. Design state, goal structure, generative design operations, early quantitative evaluations, control of design process. Basic models of design (transformational, plan/architecture driven). Relationship to other life-cycle activities.

Arch/Design Representations (9h)

What should be represented (structure, behaviour)? Informal representations of design, examples of design notations. Formal representation of design. Domain specific architecture descriptions. Role of standards, reference architectures. Design documentation.

Design Plans/Arch (9h)

Review of small/medium scale plans (data structures, programming language structures, concurrency). Plans/architectures for common types of software systems (translators, embedded, real-time, user interface).

Design Strategies and Methods (6h)

Design strategies. Selected methods: object modelling technique, structured design, real-time, user interfaces. Methods for design with off-the-shelf components.

Design Assessment (3h)

Assessment dimensions and factors affecting their relative importance. Design tradeoffs. Evolvability/understandability criteria. Design complexity metrics. Assessment strategies (analytical, simulation, rapid prototyping), example: response time/throughput estimation.

Design Verification (3h)

Design reviews, scenarios and test cases, testing of executable design representations. Verification of properties.

Administrative Notes

Land Acknowledgement

As a settler, I want to acknowledge that I live and work on the traditional territory of the Attawandaron (Neutral), Anishnawbe and Haudenosaunee peoples. The University of Waterloo is situated on the Haldimand Tract, the land promised to the Six Nations that includes six miles on each side of the Grand River. Truth & Reconciliation Response Projects.

Mental Health Support

The Faculty of Math encourages students to seek out mental health support if needed. On-campus Resources:

  • Campus Wellness
  • Counselling Services: counselling.services@uwaterloo.ca/ 519-888-4567 ext 32655
  • MATES: one-to-one peer support program offered by Waterloo Undergraduate Student
  • Association (WUSA) and Counselling Services: mates@wusa.ca
  • Health Services: located across the creek from the Student Life Centre, 519-888-4096.
Off-campus Resources:
  • Good2Talk (24/7): Free confidential helpline for post-secondary students. Phone: 1-866-925-5454 (Ontario and Nova Scotia only)
  • Here 24/7: Mental Health and Crisis Service Team. Phone: 1-844-437-3247 (Waterloo Region only)
  • OK2BME: Set of support services for lesbian, gay, bisexual, transgender or questioning teens. Phone: 519-884-0000 extension 213 (Waterloo Region only)
  • EMPOWER ME  1-833-628-5589 for Cdn./USA other countries see: http://studentcare.ca/rte/en/IHaveAPlan_WUSA_EmpowerMe_EmpowerMe
  • EMPOWER ME in China: China North 108007142831; China South 108001402851
Diversity: It is our intent that students from all diverse backgrounds and perspectives be well served by this course and that students’ learning needs be addressed both in and out of class. We recognize the immense value of the diversity in identities, perspectives, and contributions that students bring, and the benefit it has on our educational environment. Your suggestions are encouraged and appreciated. Please let us know ways to improve the effectiveness of the course for you personally or for other students or student groups. In particular:
  • We will gladly honour your request to address you by an alternate/preferred name or gender pronoun. Please advise us of this preference early in the term so we may make appropriate changes to our records.
  • We will honour your religious holidays and celebrations. Please inform of us these at the start of the course.
  • We will follow AccessAbility Services guidelines and protocols on how to best support students with different learning needs.

Policies

Academic Integrity

  • In order to maintain a culture of academic integrity, members of the University of Waterloo community are expected to promote honesty, trust, fairness, respect and responsibility. [Check the Office of Academic Integrity for more information.]

Grievance

  • A student who believes that a decision affecting some aspect of his/her university life has been unfair or unreasonable may have grounds for initiating a grievance. Read Policy 70, Student Petitions and Grievances, Section 4. When in doubt, please be certain to contact the department’s administrative assistant who will provide further assistance. , Student Petitions and Grievances, Section 4.

Discipline

  • A student is expected to know what constitutes academic integrity to avoid committing an academic offence, and to take responsibility for his/her actions. [Check the Office of Academic Integrity for more information.] A student who is unsure whether an action constitutes an offence, or who needs help in learning how to avoid offences (e.g., plagiarism, cheating) or about “rules” for group work/collaboration should seek guidance from the course instructor, academic advisor, or the undergraduate associate dean. For information on categories of offences and types of penalties, students should refer to Policy 71, Student Discipline. For typical penalties check Guidelines for the Assessment of Penalties.

Appeals

  • A decision made or penalty imposed under Policy 70 (Student Petitions and Grievances) (other than a petition) or Policy 71 (Student Discipline) may be appealed if there is a ground.
  • A student who believes he/she has a ground for an appeal should refer to Policy 72 (Student Appeals).
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