Transcript Introduction to PSP
Personal Software Process Lecture 1 Introduction to PSP
www.cs.put.poznan.pl/~nawrocki/mse/psp/ Copyright, 1999 © Jerzy R. Nawrocki
Plan of the lecture
•
Introduction
• SPI • CMM • PSP • Organisation of the course • Summary J. Nawrocki, PSP, Lecture 1
About Ireland
• Population: ~ 3.5 million • Second largest exporter of software • ~every global IT company has its branch in Dublin area • Revenue per IT worker: ~120 000 USD • Profit per IT worker: ~13 000 USD • Advantages of Ireland: English, cheap work force, on the edge of Europe, taxes J. Nawrocki, PSP, Lecture 1
IT education in Ireland
• Post Graduate Diploma in Computer Applications for Education (evening courses) • Centre for Software Eng., DCU • PSP course, DCU, 1996 J. Nawrocki, PSP, Lecture 1
Plan of the lecture
• Introduction •
SPI
• CMM • PSP • Organisation of the course • Summary J. Nawrocki, PSP, Lecture 1
Software crisis
OOP symptoms:
O
ver time
O
ver budget
P
oor quality Beginning: late 60’s Examples: OS 360, POLTAX, KSI ZUS ...
J. Nawrocki, PSP, Lecture 1
Software Process Improvement
• Structure vs. process • Business process improvement • ISO 9000, BPI SPI • SPI: identify processes, define them, and improve them • Processes are like habits: difficult to introduce and even harder to break J. Nawrocki, PSP, Lecture 1
Plan of the lecture
• Introduction • SPI •
CMM
• PSP • Organisation of the course • Summary J. Nawrocki, PSP, Lecture 1
What is CMM ?
CMM = C apability M aturity M odel CMM: a “way for organisations to determine the capabilities of their current processes and to establish priorities for improvement .” Software Engineering Institute (SEI), 1989-1993 J. Nawrocki, PSP, Lecture 1
CMM
Levels of CMM
5. Optimising 4. Managed 3. Defined 2. Repeatable 1. Initial J. Nawrocki, PSP, Lecture 1
Level 1 - Initial
CMM • Jazz and mess • A group of individuals instead of a team • Can be bad, can be great - depends on the fate J. Nawrocki, PSP, Lecture 1
Level 2 - Repeatable
CMM • Requirements management • Software configuration management • Software quality assurance • Software project planning and oversight • Software project tracking • Software subcontract management J. Nawrocki, PSP, Lecture 1
Level 3 - Defined
CMM • Peer reviews • Inter-group co-ordination • Software product eng.
• Integrated software management • Training program • Software process definition • Software process focus J. Nawrocki, PSP, Lecture 1
Level 4 - Managed
CMM J. Nawrocki, PSP, Lecture 1 • Quality management • Quantitative process management
Level 5 - Optimising
CMM J. Nawrocki, PSP, Lecture 1 • Process change management • Technology change management • Defect prevention
Plan of the lecture
• Introduction • SPI • CMM •
PSP
• Organisation of the course • Summary J. Nawrocki, PSP, Lecture 1
What is PSP about ?
PSP = Personal S oftware P rocess PSP : self-improvement PSP : how to make and meet commitments PSP : forms + guidelines + procedures Watts Humphrey, SEI, 1995 J. Nawrocki, PSP, Lecture 1
PSP
Levels of PSP
3. Cyclic personal process 2. Personal Quality Mgmnt 1. Personal Planning Process 0. Baseline Personal Process J. Nawrocki, PSP, Lecture 1
Baseline Personal Process PSP0
PSP J. Nawrocki, PSP, Lecture 1 • Current process • Time recording • Defect recording • Defect type standard
Baseline Personal Process PSP0.1
PSP J. Nawrocki, PSP, Lecture 1 • Size measurement • Coding standard • Process improvement proposal
Personal Planning Process
PSP1: • Size estimating • Test report PSP PSP1.1: • Task planning • Schedule planning J. Nawrocki, PSP, Lecture 1
Personal Quality Management
PSP2: • Code reviews • Design reviews PSP PSP2.1: • Design templates J. Nawrocki, PSP, Lecture 1
Cyclic Personal Process
PSP Large projects (10 KLOC) Divide an conquer An incremental approach: 1. A base module 2. Enhancements (iterative cycles) Each iteration is a PSP2 J. Nawrocki, PSP, Lecture 1
CMM and PSP CMM PSP
J. Nawrocki, PSP, Lecture 1
What is PSP not about ?
• Risk management?
• Requirements analysis and specification?
• Software configuration management?
• Software modelling?
J. Nawrocki, PSP, Lecture 1
Team Software Process (TSP)
Large software and short time Too many details and interrelationships The habituation problem TSP: support from your peers (e.g. reviews) J. Nawrocki, PSP, Lecture 1
Plan of the lecture
• Introduction • SPI • CMM • PSP •
Organisation of the course
• Summary J. Nawrocki, PSP, Lecture 1
Organisation of the course
The goal: to create a software organisation (SDS) of CMM level 2 .
Requirements management Configuration management Quality assurance Project planning Project tracking & oversight J. Nawrocki, PSP, Lecture 1
Scope of the course (1)
• Introduction to PSP • Developing an effective personality • Risk management • Software quality assurance (-) • Requirements management • Software configuration management • The baseline PSP (PSP 0 & 0.1) • Estimating software size (PSP 1) J. Nawrocki, PSP, Lecture 1
Scope of the course (2)
• Time and schedule estimating (PSP 1.1) • Function points and COCOMO II • Project tracking and oversight • Software design (PSP 2.1) • Design and code reviews (PSP 2) • Software testing • Quality management and SPI J. Nawrocki, PSP, Lecture 1
J. Nawrocki, PSP, Lecture 1
Summary
PSP is a self-improvement method PSP deals with: • Project planning • Software quality
Further readings
• W.S. Humphrey, A Discipline for Software Engineering, Addison-Wesley, 1995 • www.cmu.edu
• J.Nawrocki, M.Płażewski, A.Trendowicz, F.Woźniak, Doskonalenie ... metodą PSP, Pro Dialog, 1998 J. Nawrocki, PSP, Lecture 1
Quality assessment
• What is your general impression ? (1 - 6) • Was it too slow or too fast ?
• Did you learn something important to you ?
• What to improve and how ?
J. Nawrocki, PSP, Lecture 1