Dr Deepak B Phatak - it.iitb.ac.in · PDF file– System Software ... – Railway...

CS 101 Computer Programming and utilization

Dr Deepak B Phatak Subrao Nilekani Chair Professor

Department of CSE, Kanwal Rekhi Building IIT Bombay

Session 15,Software Engineering and Course Projects

Friday, September 23, 2011

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Session 15, Software Engineering and course projects

Dr. Deepak B Phatak 2

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Overview

• Introduction to Software Engineering • Role of Software • Software development process

• Course projects • Activities to be carried out in the project • Reporting process • Deadlines

• Project evaluation • Stage I • Stage II


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Software Engineering


• Principles of Software Engineering • Software Engineering Activities • Process Maturity Measures • ER Model • Functional Model

– Data Flow Model • User Interface Issues • Software Requirement Specifications (SRS)


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Role of Software


• Classical categorization – System Software – Application Software – Embedded software – Web applications


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System Software


– OS, Programming Languages (3GL) compilers – 4GL (SQL), Rapid Application Development (RAD) Tools – Tools To Build Software Keep Evolving


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Application Software


• Determines Business Functionality • Students’ Information system, Accounting, payroll, …

– Railway reservation, Core banking, … – Simulators, Equation solvers, genome sequencing – Typical Life Cycle: 10 -25 Years


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Embedded systems


• Software inside any gadget or appliance – Washing machines, watch, camera, lift, car, aircraft, … – Equipment in manufacturing Plant, Instruments

• Some special characteristics – Code size has to be ‘compact’ – Changes in versions are difficult – Development cycle is longer


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Software Engineering


• Software is Developed or Engineered – Not Manufactured

• Hardware does wear out • Software does not “Wear Out”

– May Become Un-Maintainable • Most Software is Custom-Built

– Limited Role for Packaged Products Which Need Customization and Integration With Other Apps.


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Definition


• Application Of a Systematic, Disciplined, Quantifiable Approach To The Development, Operation And Maintenance Of Software; i.e., The Application Of Engineering To Software – IEEE Definition 1993

• Engineering is The Analysis, Design, Construction, Verification and Management of Technical (Or) Social Entities

• To Engineer S/W, We Must Define a Development Process


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Software Engineering Activities


• Functional Specifications • System Engineering • Feasibility Study • Allocation To H/W, S/W, People • System Analysis • System Design • Coding, Testing, Integration • Acceptance & Deployment


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Software project management


• Basic Project Management • Software Teams • Coordination & Communication • Process and Project Metrics • Based on Lines of Code (LoC) • Function Point Oriented • Project Scheduling and Tracking


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SEI models


• Software Engineering Institute – At Carnegie Mellon University

• Capability Maturity Model • Five Levels of Maturity to Measure Effectiveness of an

Organization in its Software Development Practices


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CMM LEVEL 1 (Initial)


• Process is Ad Hoc (Even Chaotic) • Very Few Processes Are Defined • Success Depends Entirely On Individual Efforts


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Classical System analysis


• Understand S/W Requirements – What functions should the system perform – Specify S/W Functions, Interfaces, Constraints

• Represent Information Domain Of The Problem – Which Data, How Manipulated – What is input, what output is desired – Rules governing values of data – Rules governing processing logic


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Tasks to be completed during system analysis


• Modeling Interactive Screens – Capture and Validate Input – Query screens for Data Retrieval

• Modeling Reports – Contents and Format (text, graphics) – On Screen, On Printer

• Special Interfaces • Screen And Forms Layouts • Source And Target files • Operational Considerations • Ease Of Use (User Friendliness)

– Keystroke Minimization


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SRS document (modified for CS101)


• Introduction • Problem definition for your project

– Functional Specifications • Description of data (Input and Output) • User Interface Requirements • Interfaces to Other Systems, if any • Acceptance Criteria • Appendices


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CS101 Course Projects

• The course project is a chance for you to apply your programming knowledge to solve a larger problem by developing programs to solve the problem – A taste of professional Software Development activity


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Course Projects …

• Open ended Projects – What is to be done is not necessarily well defined – Team work will be most important

• Efforts MUST be made by each individual member • Two stage submission and evaluation process • Stage 1

– Problem definition – Analysis, and design of the algorithms, sample code – SRS document, including draft User Manual

• Stage 2 – Complete implementation, final documentation


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You will learn …


• Basic principles of project management • Professional programming style • To work together in groups, towards a common goal • To discuss, design, document, review • To take decisions, to meet deadlines


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Coordination of project activities


• A lab-batch will work on an allocated programming project • Your batch TA will be your project mentor • Each batch may divide itself into multiple teams

– A team should ordinarily have 3 students – Each team to elect a team leader – All the team leaders will be joint coordinators for the batch

• Regular meetings and discussions amongst members of a batch – Lab attendance is now COMPULSORY – At least one additional meeting per week


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Project diary


• Each student must maintain a record of the time spent for the project and specific work done in that time. The categorization of nature of the work could be as follows: – Discussions (names of participants, nature of discussion,

decisions taken) – Design: Data/file/algorithm/function/program – Programming – Testing/Documentation/Report writing – Logistics (maintaining records of meetings and decisions,

uploading files, CVS work, etc.) – Miscellaneous


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Project diary …


• Each student will maintain a project diary – Daily entries, format will be notified

• Consolidated entries to be uploaded every week – Each batch will sum up the number of person hours

spent by each member on each of the subheads during the week


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Submission Schedule


• Will be notified on moodle – Weekly diary submissions – Stage wise submission schedule – Stage wise evaluation process


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Self evaluation with Peer-review


• Perhaps never attempted by any of you earlier – Good time to learn

• Award Marks out of 5 to yourself, at each of the two stages – Based on the quantitative and qualitative contribution – Norms will be defined.

• The entire batch will review these marks in a formal meeting • Supervisory check

– Viva will be conducted for some selected student – Marks will be uniformly deducted for every student of the

batch if effort/marks discrepancy is noticed during viva


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Announcements


• Make-up activity for Lab assignments – Problems will be assigned by the TA – Submissions will be evaluated, viva may be conducted – Lab assignment marks will be upgraded appropriately

• Make-up for midsem examination. – Will be conducted for students scoring less than T – New scores to replace old (Up to T)

• Lab attendance is compulsory from next week – Additional batch meetings will be essential

• Additional lab-slot on Monday, Wednesday, Saturday, Sunday – Very limited TA support – You will need to pre-register


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Project selection

• Projects of Cs101-2010 batch will be uploaded on the moodle • A new portal is being • The URL of the C portal along with other requisite information

regarding the log in details for students www.it.iitb.ac.in/Cportal • Students can login with following details Username: RollNo Password: RollNo Right Now, • You can access data on projects quiz, post things to the forum...

• You may have to download

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