Object- Oriented Analysis and Design. Isara Anantavrasilp

Transcription

1 Object- Oriented Analysis and Design Isara Anantavrasilp Isara Anantavrasilp 1

2 Course Descrip<on This course covers the principles and methodology of object- oriented analysis and design, with emphasis on the use of the Unified Modeling Language (UML), and also the object- oriented development methodology under the unified process. Students will study how to u<lize various UML diagrams as well as several design pa8erns in solware analysis and design processes. Isara Anantavrasilp 2

3 Computer Applica<ons We are familiar with applica<ons or apps A computer program that executes on a compu<ng device to carry out a specific func<on Informa<on System A set of interrelated computer components that collects, processes, stores and provides output needed to complete business tasks App vs Informa<on System App covers only computer solware Informa<on system covers en<re process (incl. manual process) As developers, we may have to develop en<re informa<on system, not just individual apps Isara Anantavrasilp 3

4 Building a House When you want to build a house: You, the owner (or customer), have a vision and budget You need builders to carry out the construc<on You also need an architect who transforms your vision to building plans Images: wikipedia.com Isara Anantavrasilp 4

5 Building a SoLware Product Owner System Analyst (SA) (Architect) Programmers (Builder) Has the vision Has budget Accepts the wriyen solware Planning Capturing vision Understand details Specifying needs Define solu<ons Check whether the wriyen solware sa<sfies the vision System Analysis and Design Develop the solware (to code) Some<mes they are the architect themselves Isara Anantavrasilp 5

6 System Analysis and Design System analysis: Ac<vi<es that enable a person to understand and specify what the new (solware / informa<on) system should accomplish To understand and specify Describes what the system must do to sa<sfy the need or to solve the problem System design: Ac<vi<es that enable a person to define and describe in detail the system that solves the problem To solve the problem Describes how the system will work Isara Anantavrasilp 6

7 Project Developing a new system is usually done as a project Project: A planned undertaking/opera<on that has a beginning and an end. It also produces some definite result To manage a project, you may use a project management framework as a guideline to coordinate your team and working process Isara Anantavrasilp 7

8 SoLware Development Process Maintenance Planning Customer envisions his product What are we gonna do? Feasibility check Tes<ng and Deployment Implementa<on Requirement Analysis Iden<fy the problem or need What the solware is supposed to do Obtain approval to proceed Result: RAD Design Aka. SoKware Development Life Cycle (SDLC) 09/01/2013 Isara Anantavrasilp Discover and understand the details of the problem Design the components that solve the problem 8

9 Agile Development Process Cyclic SDLC is a classical way to develop solware Waterfall and V- Model are some of the examples The process is easy to understand and manage However, solware development is a usually dynamic Requirements may be changed Some of the obstacles or difficul<es are not an<cipated New concept: Agile Development Process Isara Anantavrasilp 9

10 Agile Development Process Agile Development Process (Agile Process): SoLware development process that emphasizes flexibility to an<cipate new requirements during development Embraces changes Welcome changing requirements, even late in development. Sa<sfy the customer through early and con<nuous delivery of valuable solware Deliver working solware frequently, from a couple of weeks to a couple of months, with a preference to the shorter <mescale. Isara Anantavrasilp 10

11 Itera<ve and Incremental Development Agile process is one of itera<ve and incremental development approaches Escher s waterfall Itera<ve: Repea<ng the same (waterfall) process over and over again Incremental: Adding pieces of the system at different <mes and rates Image: h8p://en.wikipedia.org/wiki/waterfall_(m._c._escher) 16/01/2013 Isara Anantavrasilp 11

12 Itera<ve and Incremental Development (2) In itera<ve an development The development process is repeated We say that one big project consists of many mini- projects We call this mini- project an itera<on Planning Requirement System Analysis System Design Implementa<on Test and Deploy Itera<ons Isara Anantavrasilp 12

13 Itera<ve and Incremental Development (3) An itera<on usually last 2-4 weeks Benefits of itera<ve and incremental approaches Por<ons of the system can be deployed sooner Problems can be addressed early You have working system aler each itera<on Isara Anantavrasilp 13

14 What lies ahead.. In this course, we will learn How to design a solware system with object- oriented paradigm UML: Unified Modeling Language How to transform user s requirements into UML You will be agile Isara Anantavrasilp 14

15 Tenta<ve Schedule Week 1: Introduc<on and the big picture Week 2: Requirement elicita<on and modeling Week 3: Scenarios, Use case and Ac<vity diagrams Week 4: Extrac<ng tasks with User Stories Week 5: Modeling the problem domain with class and ER diagrams Week 6: Modeling the problem domain with class and ER diagrams (2) Week 7: Sequence diagram Week 8: State- Machine diagram Week 9: User interface and interac<on Week 10: User interface and interac<on (2) Week 11: Architectural design Week 12: Persistence object analysis and database design Week 13: Introduc<on to Design PaYerns Week 14: Source Code Controls Isara Anantavrasilp 15

16 Evalua<on Midterm exam 40% Final exam 60% Free stuff: If you come at least 12 classes ON TIME (+5 mins) and par<cipate in the lecture, I will give you 10% score for free. This means, if your final score is 70%, it will be boosted to 80% Isara Anantavrasilp 16

17 Textbooks Bernd Bruegge and Allen H. Dutoit, Object- oriented So/ware Engineering: Using UML, Pa;erns, and Java, 3 rd Edi?on, Pren<ce Hall, 2009 Satzinger W., Jackson R., Burd S., Introduc?on to Systems Analysis and Design : An Agile, Itera?ve Approach, 6th edi<on, Cengage Learning, 2012 (Images in these slides are taken from this book.) 17

18 Textbooks Larman C., Applying UML and Pa;erns: An Introduc?on to Object- Oriented Analysis and Design and Itera?ve Development, 3 rd Edi?on, Pren<ce Hall, 2004 BriYon C., Doake J., A Student Guide to Object- Oriented Development, BuYerworth- Heinemann,