5 - Quality

Question 1

Validation

Answer 1

External and informal process that checks if the product meets the stakeholders needs

Question 2

Name three Quality Goals.

Answer 2

error reduction and elimination + customer satisfaction + quality proof + certification of the development + cost reduction + adaptability + flexibility (change requests)

Question 3

Hazard Analysis

Answer 3

Catastrophic (loss of the system) + Hazardous (serious or fatal injury) + Major (significant reduction in safety margin) + Minor (slight reduction in safety margin)

Question 4

CMMI

Answer 4

Capability Maturity Model Integration. Model that improves the maturity of a company and consists out of five levels BUT: high CMMI != better product level

Question 5

How can we measure Software Quality?

Answer 5

By Complexity (LOC & number of commands & nesting depth) or Errors (#codingErrors/LOC & #errors/month & users w/o problems)

Question 6

Likelihoods of Hazards

Answer 6

Probable (110^-5) + Remote (<110^-5) + Extremely Remote (<110^-7) + Extremely Improable (<110^-9)

Question 7

Testing

Answer 7

system execution with the goal to find errors + shows presence BUT not absence of bugs

Question 8

SPICE

Answer 8

Software Process Improvement and Capability Determination: maturity evaluation to process improvement

Question 9

Employer Qualification

Answer 9

education (training & certification) & standardized procedures (models/tools) & improvement of communication and employer motivation

Question 10

Standards for Quality Assurance

Answer 10

Quality Standards (DIN 9000-3/ISO 9126) + Development Standards (ISO 12207/V-Model/…) + Maturity Standards (CMMI/SPICE) + Safety Standards

Question 11

Principles of Information Security

Answer 11

Confidentiality (data is read only) + Availability (data access guaranteed within time frame) + Integrity (no unnoticed modification/changes traceable)

Question 12

Safety

Answer 12

System is free of unacceptable risks/hazards + fail-silent and fail-sage

Question 13

Quality Attributes

Answer 13

Reliability (eg. Fault Tolerance) + Efficiency + Usability + Maintainability (Modularity/Adaptability/Stability) + Security + Diagnoasability (Error Detection & Management) + Correctness + Portability (Migratability/Adaptability) + Robustness (Maturity/Reliability/Recoverability)

Question 14

Quality Audits

Answer 14

independent examination of product/process

Question 15

Quality Review

Answer 15

work out strengths and weaknesses of a product

Question 16

Security

Answer 16

System is protected against threats and attacks

Question 17

System Risks

Answer 17

Wrong Requirements + Functional Incorrectness

Question 18

Architecture Review

Answer 18

Active Design Review + SAAM (Software Architecture Analysis Method) + ATAM (Architecture Trade-Off Analysis Method) + CBAM (Cost Benefit Analysis Method)

Question 19

Possible Project Risks

Answer 19

Budget Overrun + Missed Deadlines + Quality Problems + Discrepancies/Misunderstandings with customer

Question 20

Verfication

Answer 20

Internal and formal process that checks if a product was realized correctly