Lecture 8 - Software Estimation II

Question 1

What is the problem with LOC?

Answer 1

To calculate LOC you have to wait until the system is implemented

Question 2

What does function points measure?

Answer 2

Measure the functionality offered by a system

Question 3

A function can be defined as…

Answer 3

a collection of executable statements that performs a certain task

Question 4

TF: Function points can be calculated before a system is developed

Answer 4

True

Question 5

TF: Function points are language and developer dependent

Answer 5

False. Language and developer independent

Question 6

A function point count is calculated as a weighted total of what 5 components that comprise an application?

Answer 6

• External inputs
• External outputs (i.e. reports)
• Logical internal files
• External interface files (files accessed by application but not maintained by it)
• External inquiries (types of online inquiries supported)

Question 7

What is a disadvantage of Albrecht FP Wightings?

Answer 7

The weights of components are assigned subjectively

Question 8

What is the simplest way to calculate a function point using average weight for all elements count?

Answer 8

(# external inputs x 4) + (# external outputs x 5) + (# logical internal files x 10) + (# external interface files x 10) + (# external inquiries x 4)

Question 9

Slide 12 Function Points example

Answer 9

Slide 13 Answer

Question 10

TF: When FP was originally defined by Albrecht, the question of whether external user type was high, low, or average complexity was intuitive

Answer 10

True

Question 11

What did the International FP User Group (IFPUG) do to clarify the complexity of external user types?

Answer 11

declared rules on how to categorize complexity for it

Question 12

What is COSMIC - FFP (ISO 19761)?

Answer 12

A functional size measurement method

Question 13

What does COSMIC method use as inputs for the measurement process for a software project?

Answer 13

Functional User Requirements (FURs)

Question 14

Each functional process is… (3)

Answer 14

• Independently executable
• Triggered by an event
• Contains all that is required to be done in response to the triggering event

Question 15

What are the data movement types? (4)

Answer 15

Entry (E), Exit (X), Read (R), Write (W)

Question 16

What are entry types?

Answer 16

Includes certain associated data manipulations such as validation of the entered data

Question 17

TF: Triggering events are Entry Types

Answer 17

True

Question 18

TF: Clock and timing events are not triggering events

Answer 18

False. They are

Question 19

TF: Each data movement moves data belonging to multiple groups

Answer 19

False. Moves data belonging to a single data group

Question 20

What are the six procedures of COSMIC measurement?

Answer 20

1. Identify functional users
2. Identify triggering events
3. Identify the functional processes enabled by those events
4. Identify the data groups
5. Identify the data movements from interface (Entry, eXit, Read, Write)
6. Obtain total number of COSMIC function points (CFPs)

Question 21

Slide 23 Example

Answer 21

Slide 24-27 Solution

Question 22

What does an Entry do in Principles of the COSMIC FSM?

Answer 22

Moves a data group into a functional process from a functional user

Question 23

What does an Exit do in Principles of the COSMIC FSM?

Answer 23

Moves a data group out of a functional process to a functional user

Question 24

What does a Write do in Principles of the COSMIC FSM?

Answer 24

Moves a data group from a functional process to a persistent storage

Question 25

What does a Read do in Principles of the COSMIC FSM?

Answer 25

Moves a data group from persistent storage to a functional process