configuration management at cmm level 2 copyright, 2000 © jerzy r. nawrocki...

Configuration Management at CMM Configuration Management at CMM Level 2Level 2

Copyright, 2000 © Jerzy R. Nawrocki

[email protected]

www.cs.put.poznan.pl/jnawrocki/mse/require/

Requirements Engineering Requirements Engineering

Lecture 8Lecture 8

Requirements Engineering Requirements Engineering

Lecture 8Lecture 8

J. Nawrocki, Requirements Eng., Lecture 8

Plan of the lecturePlan of the lecturePlan of the lecturePlan of the lecture

IntroductionAbilitiesActivities


IntroductionIntroductionIntroductionIntroduction

CMMCMM

• Requirements management• Software project planning• Software project tracking and

oversight• Software subcontract

management• Software quality assurance• Software configuration

management

CMM Level 2 - Repeatable



A way of dealing with changes

Soft. Configuration Management?

Couldn’t youremove the

second floor?



Configuration item = “An aggregation of

• hardware, • software, or

both that is designated for configuration management and

treated as a single entity in the configuration management process.” [CMM , IEEE Std 610]

Configuration item [CMM ]

How aboutSRS?



SCI = “Information that is created as part of the software engineering process.” [R.Pressman]

Types of SCIs:• computer programs (source code

or exec)• documents (also manuals)• data (e.g. test cases)

Soft. Configuration Item (SCI)

if (a > b) a-= b;

18 27



• Name (character string)• Description (SCI type, project

identifier, version information, change information)

• Resources required by the SCI (e.g. global variables required to compile the module)

• Realisation (e.g. a link to a text file)

SCI identification

if (a < b) a+= b;

What’s this?



• Basic• Aggregate (composed

of basic or aggregate SCIs)

SCI can be ...

.bat

.pas

Test bed

.in .out

Batch file

Input Expected output

Test suite: an aggr. SCI



A specification or product that has been formally reviewed and agreed upon,

that thereafter serves as the basis for further development, and

that can be changed only through formal change control procedures.

Baseline [IEEE 610-1990]

Specification

DesignCode

Test cases


Base-line


Baseline or SCI?

Engineering

Change it!

Change control

SCI

FTR

SCI

Baseline library

Baseline



Introduction

AbilitiesActivities


AbilitiesAbilitiesAbilitiesAbilities

Ab1. A Software Configuration Control Board (SCCB) having the authority for managing the project software baselines exists.

Ab2. A Software Configuration Management Group (SCMG) responsible for co-ordination and implementation of SCM for the project exists.


Soft. Configuration Control Board


Authorise: to give official or legal permission for something.

Establish: to start a company, organisation, system, situation etc that is intended to exists or continue for a long time.

Longman Dictionary


Soft. Configuration Control Board

SCCB


Authorises:• the establishment of software

baselines,• the identification of configuration

items,• the creation of products from the

baseline library.Represents the interests of the

project manager and all groups affected by changes to baselines.

Reviews and authorises changes.


SCCBs at PUT

SCCB


In-SCCB (for changing internal commitments):

• Quality Assurance Group (5th year)• Project Managers (4th year)

Ex-SCCB (for changing external commitments:

• In-SCCB members• Customer representative• Project area manager (Bartek)


Soft. Configuration Management Group


Creation and management the baseline library.

Development, maintenance and distribution of the SCM plans, standards and procedures.

Identification of work products to be placed under SCM.

Management of access to the baseline library.

SCMG co-ordinates or implements:SCMG




Updates of the baselines.Creation of products from the

baseline library.Recording of SCM actions.Production and distribution of SCM

reports.

SCMG co-ordinates or implements:SCMG



SCMG


SCMG at PUT:• one of Project Managers (4th

year) called S.C. Manager



Ab3. Adequate resources and funding are provided.

Ab4-5. Software engineers and members of the SCM group are trained to perform their activities.

Is it enough?



IntroductionAbilities

Activities


ActivitiesActivitiesActivitiesActivities

Ac1. A SCM plan is prepared for each project according to a documented procedure.

I’m afraid, I needa documented

procedure!



• The SCM plan is developed not later than the first version of the SRS.

• The SCM plan is authored by S.C. Manager.• The SCM plan should be baselined, i.e. it

should be placed under SCM.• The SCM plan is reviewed by all the team

members i.e. Quality Assurance Group (5th year), Project Managers (4th year), and Developers (3rd year).

SCM Planning Procedure (I)



• The SCM plan is approved by the Project Area Manager (Bartek).

• The SCM plan is available through the project’s web page along with all the previous versions of it. That web page is maintained by the S.C. Manager and is referenced in the Initial Project Description (IPD).

SCM Planning Procedure (II)



Ac2. A documented and approved SCM plan is used as the basis for performing the SCM activities

LatherRinseRepeat

HairManagement

Plan



1. Introduction

1.1 Purpose of the Document

1.2 Scope of the Plan

1.3. Definitions, Acronyms, and Abbreviations

1.4 References

2. SCM scheduled activities (establishment of the baseline library system, SCM training, etc.)

SCM Plan (I)



3. Products to be placed under SCM

4. Change management procedure (Ac. 5-6)

5. Creating a product from the baseline library

6. Recording the status of configuration items

7. Reporting SCM activities

8. Software baseline audits

SCM Plan (II)



Ac3. A configuration management library system is established as a repository for the software baselines (Baseline Library System).

Baseline library

Baseline



Storage and retrieval of SCIs.

Sharing and transfer of SCIs within the project team.

Helps in the use of product standards for SCIs.

Storage and recovery of archive versions of SCIs.

Baseline Library System (I)

Baseline library

Baseline



Helps to ensure correct creation of products from the baseline library.

Storage, update, and retrieval of SCM records.

Supports production of SCM reports.

Maintenance of the library structure and contents

Baseline Library System (II)

Baseline library

Baseline



BLS at PUT:• HTML pages + (CVS [CVS] or

MS Visual Source Safe)

Baseline Library System (III)

Baseline library

Baseline



Ac4. The work products to be placed under configuration management (baselined SCIs) are identified.

Specification

DesignCode

Test cases



At minimum:• IPD• SRS• Design• Code• Test cases and test beds

Baselined SCIs at PUT

Specification

DesignCode

Test cases



Ac5. Change requests & problem reports for all SCIs are

• initiated, • recorded, • reviewed,• approved, and• tracked

according to a documented procedure.

Remove2nd floor!



Change control at PUT

Change request

Err

User S.C. Manager

Change request

Developer

Change report

SCCB

Deci-sion



Change control at PUT

Change request

Err

User S.C. Manager

Change request

Developer

Change report

SCCB

Deci-sion

Change order

P. Manager


ActivitiesActivitiesActivitiesActivitiesChange request

Change request number: ............................

Sender: .........................................................

Sender’s e-mail: ...........................................

Date: ..............................................................

Urgency: ................. Importance: ..............

Description: .................................................

.......................................................................

.......................................................................

Evaluator: .....................................................

Evaluate by: ........... Type (in/external) .......


ActivitiesActivitiesActivitiesActivitiesChange report

Change request number: ..........................

Evaluator: ...................................................

Evaluator’s e-mail: .....................................

Date: ............................................................

Urgency: ................ Importance: ..............

Is the change justifiable? ..........................

Main risk factors: .......................................

Possible implementor: ..............................

Change implement. effort (expect): .........

Change evaluation effort (actual): ............


SummarySummarySummarySummary

• A baseline is a kind of SCI.• Baselines can be identified

and accessible through their web pages.

• A SCCB at PUT consists of QAs and Project Managers.

• A SCMG at PUT consists of one person called S.C. Manager.

• SCM Planning procedure & Standard SCM plan struct.


Further readingsFurther readingsFurther readingsFurther readings

[CMM] M.C. Paulk et. al.,The Capability Maturity Model: Guidelines for Improving the Software Process, Addison-Wesley, Reading, 1994.

[Pressman] R. Pressman, Software Engineering. A practitioner’s Approach, McGraw Hill, New York, 1997.

[CVS] http://www.loria.fr/~molli/cvs/doc/ cvs_toc.html


HomeworkHomeworkHomeworkHomework

• Write SCM plan for your project. (4th year)

• Organise a FTR or Fagan-like inspection of an SCM plan. (5th year)


Quality assessmentQuality assessmentQuality assessmentQuality assessment

1. What is your general impression? (1 - 6)

2. Was it too slow or too fast?

3. What important did you learn during the lecture?

4. What to improve and how?

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