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Ten Things every Software Tester Should Know; European Efforts in Tester Certification

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Title: Ten Things every Software Tester Should Know; European Efforts in Tester Certification


1
Ten Things every Software Tester Should Know
European Efforts in Tester Certification
  • Michael Kress
  • Associate Technical Fellow
  • Boeing
  • Chair American Society for Quality Software
    Division

2
Ten Things every Software Tester Should Know
European Efforts in Tester Certification
  • What world do you live in?
  • The gospel according to Bach
  • This world? Or this?
  • Complete specs Implicit specs
  • Quantifiable criteria Meaningful criteria
  • Protected schedule risk driven iterations
  • Early involvement good relationships
  • Zero defects Good enough
  • Complete test coverage enough information
  • James Bach 13 ICSQ, Dallas, Oct 6, 2003

3
Ten Things every Software Tester Should Know
European Efforts in Tester Certification
  • 1. Know the specified requirements
  • How many requirements are there?
  • Know when the requirements are mature and
    complete.
  • Do Requirements progress tracking.
  • How do you count and track requirements?
  • Thesystem shall accept the user input, and
    compute, and store in locations 1,2 and 3, and
    send the output to.

4
Ten Things every Software Tester Should Know
European Efforts in Tester Certification
  • 1. Know the specified requirements
  • How many requirements are there?
  • Know when the requirements are mature and
    complete.
  • Do Requirements progress tracking.
  • How do you count and track requirements?
  • Thesystem shall accept the user input, and
    compute, and store in locations 1,2 and 3, and
    send the output to.

5
Ten Things every Software Tester Should Know
European Efforts in Tester Certification
  • 1. Know the specified requirements
  • How many requirements are there?
  • Know when the requirements are mature and
    complete.
  • Do Requirements progress tracking.
  • How do you count and track requirements?
  • Thesystem shall accept the user input, and
    compute, and store in locations 1,2 and 3, and
    send the output to.

6
Ten Things every Software Tester Should Know
European Efforts in Tester Certification
  • 1. Know the specified requirements
  • How many requirements are there?
  • Know when the requirements are mature and
    complete.
  • Do Requirements progress tracking.
  • How do you count and track requirements?
  • Thesystem shall accept the user input, and
    compute, and store in locations 1,2 and 3, and
    send the output to.

7
Ten Things every Software Tester Should Know
European Efforts in Tester Certification
  • 1. Know the specified requirements
  • How many requirements are there?
  • Know when the requirements are mature and
    complete.
  • Do Requirements progress tracking.
  • How do you count and track requirements?
  • Thesystem shall accept the user input, and
    compute, and store in locations 1,2 and 3, and
    send the output to.

8
Ten Things every Software Tester Should Know
European Efforts in Tester Certification
  • 1. Know the specified requirements
  • How many requirements are there?
  • Know when the requirements are mature and
    complete.
  • Do Requirements progress tracking.
  • How do you count and track requirements?
  • Thesystem shall accept the user input, and
    compute, and store in locations 1,2 and 3, and
    send the output to.

9
Ten Things every Software Tester Should Know
European Efforts in Tester Certification
  • 1. Know the specified requirements
  • How many requirements are there?
  • Know when the requirements are mature and
    complete.
  • Do Requirements progress tracking.
  • How do you count and track requirements?
  • Thesystem shall accept the user input, and
    compute, and store in locations 1,2 and 3, and
    send the output to.
  • Answer 1 shall statement, 6 requirements

10
Ten Things every Software Tester Should Know
European Efforts in Tester Certification
  • 2. Know what the customer really wants
  • Walk in the users shoes
  • Know who ALL the stakeholders are.
  • Customer
  • Regulatory authorities
  • Actual user
  • System maintainer
  • Help desk
  • Customer does not want a ¼ drill he wants a ¼
    hole
  • Why are most milkshakes sold in the morning?
  • What do people want in a cell phone?

11
Ten Things every Software Tester Should Know
European Efforts in Tester Certification
  • 3. Know Stakeholder expectations
  • Customer is not always the ultimate user.
  • Management desires a secure system, but
  • Users may find security measures a nuisance
  • Frequently changing passwords
  • Multiple passwords
  • 3 strikes and youre out (wrong passwords)
  • Cumbersome encryption features
  • Both customer and user features need attention

12
Ten Things every Software Tester Should Know
European Efforts in Tester Certification
  • 4. Know the interface requirements
  • All interfaces shall be specified
  • All interfaces shall be specified with inputs
    and outputs. Specifically for each external
    interface, the following should be specified
    control data, parity checks, data correlation and
    constraints, frequency, priority, and timing. In
    addition, each input and output should include
    source and destination, unit of measure, limits
    and ranges, scale factors, accuracy and
    precision, and frequency of arrival or delivery.

13
Ten Things every Software Tester Should Know
European Efforts in Tester Certification
  • 5. Know your products capabilities
  • Not all features are created equal
  • What is most important to users?
  • What features are rarely used?
  • What causes lockup? Consequences Recovery
  • Ship with known faults? Help desk/menus,

14
Ten Things every Software Tester Should Know
European Efforts in Tester Certification
  • 6. Know the language of testers
  • Test strategies White/black box
  • Bottom up/top down Drivers/stubs
  • Input space partition test Error seeding
  • Mutation testing Structural coverage
  • Statement, decision condition coverage Test case
    explosion
  • Requirements based testing Error prediction
  • Test case design (boundary/mid range) Domain
    testing
  • Complexity (McCabe, Halstead) Function testing
  • Defect, bug, error, fault Clean room
  • External/internal faults Fault masking
  • Ad hoc testing Dead/deactivated code
  • Defect containment/leakage 6 sigma for test
  • Constructive Software QA Analytical QA
  • V-model (Boehm) Regression testing

15
Ten Things every Software Tester Should Know
European Efforts in Tester Certification
  • A source code statement reads (IF Alt200 and
    Bgt30 THEN C1000. Which of the following sets
    of test case inputs would be selected to perform
    condition coverage for this statement?
  • Test Case 1 Test Case 2
  • a) A 200, B 30 A199, B 31
  • b) A 50, B 15 A 250, B 45
  • c) A 75, B 50 A 150, B 10
  • d) A 0, B 0 A 200, B 30

16
Ten Things every Software Tester Should Know
European Efforts in Tester Certification
  • A source code statement reads (IF Alt200 and
    Bgt30 THEN C1000. Which of the following sets
    of test case inputs would be selected to perform
    condition coverage for this statement?
  • Test Case 1 Test Case 2
  • a) A 200, B 30 A199, B 31
  • b) A 50, B 15 A 250, B 45
  • c) A 75, B 50 A 150, B 10
  • d) A 0, B 0 A 200, B 30

17
Ten Things every Software Tester Should Know
European Efforts in Tester Certification
  • Answer b) is correct.
  • To have condition coverage, each variable has to
    take on all possible conditions. Answer b) has
    test case inputs that cover the possible
    conditions. In answer a) the condition of
    variable Agt200 and Blt30 is not covered. In
    answers c) and d) the condition of variable Agt200
    is not covered.

18
Ten Things every Software Tester Should Know
European Efforts in Tester Certification
  • 7. Know the importance of Configuration Control
  • What you start with may not be what you end with.
  • What about early test versions?
  • Where to begin retest?
  • When to start over?
  • Regression tests

19
Ten Things every Software Tester Should Know
European Efforts in Tester Certification
  • 8. Know your timetable
  • Plan your tests
  • Track your progress
  • Module, H/S Integ, System VV, Acceptance tests

20
Ten Things every Software Tester Should Know
European Efforts in Tester Certification
  • 9. Know your budget
  • Money spent vs. work accomplished
  • Earned Value Tracking
  • Budgeted cost of work Scheduled (BCWS)
  • Budgeted cost of work Performed (BCWP)

21
Ten Things every Software Tester Should Know
European Efforts in Tester Certification
  • 10. Know your goals
  • How good is good enough?
  • Quantify your result
  • No major stakeholder errors present
  • Will you satisfy ??? of the market?
  • Acceptance vs. characterization tests
  • Are you ready to deliver?

22
ASQF - Arbeitskreis Software-Qualitat und
Fortbildiung English - Association for
Software-Quality and Training)
  • ASQF is the European equivalent of the American
    Society for Quality Software Division.
  •  
  • ASQF is the author, custodian administrator for a
    wide variety of software quality events,
    initiatives, and European personnel certification
    programs.
  •  
  • Host for International Assessor Certification
    Scheme Board.
  • Organizer of the 5th SPICE Conference, Austria
    April 2005
  • Organizer of the 3rd World Congress for Software
    Quality Munich, Sept 2005

23
ASQF - Arbeitskreis Software-Qualitat und
Fortbildiung English - Association for
Software-Quality and Training)
  • Founder of International Software Testing
    Qualifications Board (ISTQB)
  •  
  • International participants
  • Defined standardized Body of Knowledge
  • International Core curriculum
  • Accreditation Standards
  • A NOT-FOR-PROFIT ENTERPRISE SANCTIONED AND
    SPONSORED BY THE EUROPEAN SOFTWARE PROCESS
    IMPROVEMENT TRAINING INITIATIVE.

24
ASQF - Arbeitskreis Software-Qualitat und
Fortbildiung English - Association for
Software-Quality and Training
  • The European Organization for Quality Software
    Group is the authorizing umbrella organization
    for the
  • International Software Testing Qualification
    Board
  • Member nations
  •  
  • Sweden, Germany, Austria, Finland, Holland,
    Switzerland, Poland

25
ASQF - Arbeitskreis Software-Qualitat und
Fortbildiung English - Association for
Software-Quality and Training
  • Vision
  •  
  • Ensuring professional quality and topicality of
    the scheme
  • Generation and definition of an international
    core
  • syllabus for every qualification of the
    above scheme
  • Definition and maintenance of examination
    structure
  • and regulations
  • Definition and maintenance of accreditation
    guidelines
  • Definition and maintenance of certification
    guidelines
  • Definition and maintenance of the ideal pass
    rate
  • Monitoring compliance of the national boards to
    ISTQB
  • procedures and guidelines
  • Admission and expulsion of national boards into
    and
  • from ISTQB

26
ASQF - Arbeitskreis Software-Qualitat und
Fortbildiung English - Association for
Software-Quality and Training
  • THE ASQ SOFTWARE DIVISION IS COLLABORATING WITH
    ASQF IN BRINGING THE TESTER CERTIFICATION PROGRAM
    ( OR ONE LIKE IT) TO THE UNITED STATES UNDER THE
    ENDORSEMENT OF THE ASQ CERTIFICATION AUTHORITIES.

27
ASQF - Arbeitskreis Software-Qualitat und
Fortbildiung English - Association for
Software-Quality and Training
  • For more information
  • Dr. Bernd Hindel
  • Bernd.hindel_at_asqf.de
  • Robert Treffny
  • Robert treffny_at_asqf.de
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