Functional Analysis

Question 1

Name two tools used for functional Analysis:

Answer 1

1. Functional Flow Block Diagrams

2. Time Line Analysis

Question 2

FFBD

Answer 2

Function Flow Block Diagram

Question 3

TLA

Answer 3

Time Line Analysis

Question 4

Define Functional Analysis:

Answer 4

The systematic process of identifying, describing, and relating the functions a system must perform in order to be successful.

Question 5

True or False: Functional Analysis deals with top-level function that need to be performed

Answer 5

True

Question 6

True or False: Functional Analysis deals with how often functions need to be performed

Answer 6

True

Question 7

True or False: Functional Analysis does not deals with under what operational conditions a function is performed.

Answer 7

False

Question 8

______ ______ is used to draw out all the functions the system must perform to meet the systems requirements and concept of operations.

Answer 8

Functional Analysis

Question 9

True or False: functional analysis doesn’t describe what must be done, it describes HOW it must be done

Answer 9

False:

Functional analysis is only concerned with WHAT must be done (think ConOps)

Question 10

True or False: functional analysis is used to decouple the requirements from the implementation.

Answer 10

True

Question 11

Functional analysis is used to ______ the requirements from the implementation.

Answer 11

Decouple

Question 12

Describe the flow of functional analysis:

Answer 12

1. Develop Functional Architecture
2. Functional Flow Analysis
3. Functional Interface Analysis
4. Timeline Analysis

Question 13

Define Functional Architecture:

Answer 13

Top-down definition of system functions

Dictionary describing functions

Question 14

Define FFBD:

Answer 14

Functional Flow Block Diagram:

Used to show the SEQUENCE of all functions accomplished by a system.

Question 15

What is an N-Squared Diagram?

Answer 15

A diagram used to develop data, function and hardware interfaces.

Question 16

What does a functional timeline do?

Answer 16

Considers functions durations

Supports development of requirements for operations, test, and maintenance

Question 17

True or False: an FFBD does not necessarily show the sequential relationship of functions.

Answer 17

False

Question 18

The blocks in FFBD diagrams are described in terms of ____, ______, and _____.

Answer 18

Inputs, outputs, and interfaces

Question 19

True or False: functional flow block diagrams do not have necessary traceability

Answer 19

False:

FFBDs always have firm traceability

Question 20

FFBDs show functions arranged in a ____ sequence, whether in parallel or series.

Answer 20

Logical

Question 21

An FFBD address ____ rather than ____.

Answer 21

What rather than How

Question 22

The following is an example of ________:

1. Get there
2. obtain data
3. Generate results
4. Communicate results + data
5. Archive results + data
6. Operate Within Safety Limits
7. Terminate Mission

Answer 22

Functional Analysis
or
Functional Decomposition

Question 23

True or False: a FFBD not only describes the WHAT of missions, but the HOW LONG.

Answer 23

False.

FFBDs are only concerned with functions

Question 24

True or False: Functional Timelines are used to describe what and how things will be done, in addition to how long.

Answer 24

False

Timeline are used for HOW LONG only. Though some description of WHAT function is used to point to a related FFBD.

Question 25

Order These:

• Functional Analysis
• Design + Synthesis
• Systems Req Developments

Answer 25

1. Systems Req Developments
2. Functional Analysis
3. Design + Synthesis

Question 26

_____ is also the process of describing sub-functions that are necessary for parent functions.

Answer 26

Functional Analysis

Question 27

True or False: Functional analysis is implementation independent.

Answer 27

True, just like requirements.

Question 28

True or False: Functional analysis is weakly related to the development of requirements.

Answer 28

False, functional analysis is STRONGLY related to requirements development.