Ch 05

Question 1

EO 5.1

the five transformational processes in the perception and writing of natural language and their consequences on the formulation of requirements

Answer 1

1. Nominalization
2. Nouns without reference index
3. Universal quantifiers
4. Incompletely specified conditions
5. Incompletely specified process verbs

Question 2

EO 5.1 (1/5)

Example of Nominalization

Answer 2

Example: “In case of a system crash, a restart of the system shall be performed.”

The terms system crash and restart each describe a process that ought to be analyzed more precisely.

Question 3

EO 5.1 (2/5)

Nouns without reference index

Answer 3

Example: Nouns without reference indices The data shall be displayed to the user on the terminal. The following questions arise: What data exactly? Which user exactly? Which terminal exactly? If this information is amended, the requirement might thus read as follows:

Example: Nouns with added reference indices The system shall display the billing data to the registered user on the terminal she is logged in to.

Question 4

EO 5.1 (3/5)

Universal quantifiers

Answer 4

Example: Universal quantifiers The system shall show all data sets in every sub-menu. In this case, the following question must be asked: Really in every submenu? Really all data sets?

Question 5

EO 5.1 (4/5)

Incompletely specified conditions

Answer 5

Example: More completely specified condition The restaurant system shall offer All alcohol-free beverages to any registered user younger than 21 years All beverages including all alcoholic beverages to any user over the age of 20

Question 6

EO 5.1 (5/5)

Incompletely specified process verbs

Answer 6

Example: Requirement using the passive voice To log a user in, the login data is entered.

The same requirement using active voice might be as follows: Example: Requirement using active voice The system must allow the user to enter his user name and password using the keyboard of the terminal.”

Question 7

EO 5.2

the five steps for formulating requirements using a requirements template

Answer 7

1. Determine legal obligation
2. Determine the core of the requirement
3. Characterizes the activity of the system
4. Insert objects
5. Determine logical and temporal conditions