2. Waterfall Model, Spiral Model, Current Practice

Question 1

Er der én rigtig løsning?

Answer 1

No Silver Bullet in Software Engineering (Brooks 1987)

Question 2

Essence vs. accident; Essense

Answer 2

Essense er de essentielle problemer der kan opstå - inherent properties fx

Question 3

Essence vs. accident; Accident

Answer 3

Accident kan være de ikke essentielle men relevante problemer ved ISD

Question 4

Inherent properties?

Answer 4

Complexity, conformity, changeability, invisibility

Question 5

Complexity

Answer 5

Alt er forskelligt, stort antal af faser, stor skala

Question 6

Conformity

Answer 6

Det skal passe og være istand til at kunne betjenes

Question 7

Changability

Answer 7

Applications, users, laws, machine - alt ændres hele tiden og det skal passe derind.

Question 8

Invisibility

Answer 8

Det skal være usynligt? I guess

Question 9

Et historisk perspektiv er skrevet af?

Answer 9

Avison & Fitzgerald 2006, Methodologies for Developing IS: A historical perspective

Question 10

De 4 historiske eraer:

Answer 10

Pre-Methodology, Early Methodology, Methodology, Post-Methodology

Question 11

Pre-methodology era (1950+)

Answer 11

Introduction af computere, ingen ide af methodology, stigende interesse

Question 12

Early Methodology Era (1960+)

Answer 12

Need for standards, structure og discipline; Waterfall

Question 13

Waterfall Model phases

Answer 13

1) Requirements
2) Design
3) Implementation
4) Verification
5) Maintenance

Question 14

Methodology Era (1970+)

Answer 14

Videreudvikling på WM og nye approaches med andre paradigmer (fx Prototyping)

Question 15

Prototyping (first real methodology)

Answer 15

Botton down approach, implementing small core, grow software around core, changes made during a learning process

Question 16

Post-Methodology Era (2000+)

Answer 16

Reflection era; organisationer bruger methodologies reflekterende - kritik af disse: kræver rigtig meget

Question 17

Nye approaches in methdologies in practice:

Answer 17

1) Buy
2) Oursourcing
3) Pragmatic approaches (brug hvad du tror der virker)
4) Contingency approach
5) Agile development

Question 18

Information system?

Answer 18

Assembles, stores, processes, delivers information relevant to an organization or society

Question 19

Method?

Answer 19

Coherent og systematic approach based on a philosophy of system development