Week 4 Software Development In The 21st Century

CS 292: Beyond the One Way Web

Matthew Jett Hall, Spring 2008http://beyondtheonewayweb.wordpress.com

Chapter 3 Summary Key Messages Software Development: Process & Approach

Methodologies Tools and Techniques CMM and ITIL Constructing measures of efficiency

Staff Sourcing Models In-Source Out-Source Offshoring / Labor Arbitrage Multi-Source

CS 292-1: Beyond the One Way Web (beyondtheonewayweb.wordpress.com) 2


CASE tools make developing code more efficient

Process and technique increases organizational effectiveness

Professional Practices make the individual coder more effective

How you define and measure efficiency matters

Then: Single coder on an islandNow: Legions of coders on a single

land massCS 292-1: Beyond the One Way Web (beyondtheonewayweb.wordpress.com) 4

Art or Engineering? Procedural or Object Methodologies Tools and Techniques CMM and ITIL Constructing measures of efficiency


PROCEDURAL

Single point of entry Sequenced Subroutine Single point of exit

OBJECT

Event Driven Stimulus-Response No single point of

entry No single point of exit


Methodology A procedure by which a result is

achieved Used to organize labor activity Used to achieve an efficient outcome /

resultClassic Waterfall Iterative WaterfallXP


Process Steps Analyze Requirements Design Implement Integrate Test Maintain

Focus is on the big up front design


Rapid, light weightDeveloped to address

Shortcomings of waterfall / BUFD Fluid requirements Business Focus Small teams Pair programming Test driven coding


Language(s)CASECode and Version ManagementBug TrackingEstimation and Project ManagementProfessional Coding Practices


“ d. Computers. Any of numerous systems of precisely defined symbols and rules for using them that have been devised for writing programs or representing instructions and data. “

“language, n." The Oxford English Dictionary. 2nd ed. 1989. OED Online. Oxford University Press.



Data ModelingCode GenerationEditors IDEs


Technique to reduce data duplication in tables

Greater normalization, greater up front design

3NF: Third Normal Form Many joins Lot of SQL Statements Thoughtful design

Visualization helpsCS 292-1: Beyond the One Way Web (beyondtheonewayweb.wordpress.com) 14

Create a visual model Show interplay between objects Generate code Facilitates data normalization






Carnegie Mellon: SEIMeasure of repeatable code practiceLevels

1 Initial 2 Repeatable 3 Defined 4 Managed 5 Optimized


“ITIL is the only consistent and comprehensive documentation of best practice for IT Service Management.” Service Support Service Desk Problem and Change Management Incident Management Asset Management Configuration Management Service Delivery ITIL is a Registered Trade Mark of the Office of

Government Commerce in the United Kingdom and other countries


Costing and Estimation Line Counting Function Points Classes / Functions Elapsed and Staff Time Cost per labor and equipment

Constructive Costing Model (COCOMO)

Example ToolCS 292-1: Beyond the One Way Web (beyondtheonewayweb.wordpress.com) 22


Barry Boehm: Software Engineering Economics , 1981

Computes T= FTE Years of Effort SLOC = Source Lines of Code Based upon attribute ratings▪ Product▪ Hardware▪ Personnel▪ Project





Individual effort matters

Internal Code Documentation Code readability Coding standards Consistency Automated documents

Thoughtful data typing

Hungarian Notation

Shared standards facilitates Intergenerational transfer team coding


In-Source Out-Source Business Process Outsourcing Off-Shoring / Labor Arbitrage Multi-Source

“The future of outsourcing is to take the work from any part of the world and do it any part of the world” A. Vemuri, Infosys SVP, New York Times, Sept. 25, 2007.


Check the class playlist


United States GDP: $13.86 trillion (2007 est.) 301,139,947 (July 2007 est.) English as a standard language

India GDP $2.965 trillion (2007

est.) 1,129,866,154 (July 2007

est.) Hindi Official Language English as a moderating

standard “middleware” there are 14 other official

languages CIA World Factbook


60 Minutes Video – Leslie Stahl on IITNehru -- built it for IndiaDuring IT boom, 1 in 6 Millionaires in

Silicon Valley were IIT graduatesAdmissions

200,000 apply, about 3,000 get in Only two attempts in lifetime



Information TechnologyCall centersData managementEngineering servicesHealthcare serviceFinancial servicesDigital imagingResearch & analysis


CulturalLinguisticTime ZoneScheduling


Wharton School of Business taught me….

ShirkingPoaching

AndOpportunistic Renegotiation


Week 4 Software Development In The 21st Century

Education

design cs

optimized cs

countries cs

data normalization cs

measures of efficiency

single point of exit

single land mass cs

way web matthew jett