FA&A Process: A Methodology for Functional Analysis

Running head: SYSTEM SCIENCE AND ENGINEERING
SYSTEM SCIENCE AND ENGINEERING
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SYSTEM SCIENCE AND ENGINEERING 1
Table of Contents
Introduction:...............................................................................................................................2
Overview of the FA&A process:................................................................................................2
Approaches/methods for functional analysis.............................................................................4
Approaches/methods for functional allocation:.........................................................................5
Conclusion:................................................................................................................................7
References:.................................................................................................................................9

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Introduction:
The primary purpose of this paper is to discuss the process of functional analysis and
allocation. The report will also discuss the approaches and methods for the functional
analysis for the case study of Aircraft. In addition, the report will also discuss the approaches
and methods for functional allocation. The FA & A can bridge the gaps which are remaining
between the constraints & higher level set of the system requirements (Hui et al., 2015). The
detailed set is needed for the development or purchasing of the systems and the implemented
programs. This is one of the integral parts of the loop design and requirement loop. During
the activity, one of the integrated functional architecture has been defined for supporting the
synthesis of the solutions for allowing management and identification of attendant risk.
Overview of the FA&A process:
For the Aircraft system, the FA & A process is utilized for allocating the functions to
the components of the system. A function is one of the actions that is required for performing
a task for the fulfilment of the requirement. The functions are having outputs and inputs as
well as actions that are for transforming the inputs to the outputs (Fellbaum et al., 2014). The
functions cannot occupy the volume, having mess. The FA and A process is repeated for
defining the requirements of the performance and lower level functional requirements to
define the architectures at the increasing level of the details. The requirements of the systems
are defined and allocated in the details that are sufficient for providing verification as well as
design criteria for supporting the design of the integrated system (Barch et al., 2014). It is one
of the top down procedure for the requirements of translating systems into the performance
and functional details in detail. The design criteria are including:

SYSTEM SCIENCE AND ENGINEERING 3
 To define the system in the functional terms decomposing the functions which are of
the highest level into the sub functions. Which is identifying at the lower levels which
actions the systems need to do.
 Defining as well as identifying all of the internal and external interfaces
(Faulconbridge and Ryan, 2003).
 Translating the performance of higher level needs and requirements in the
performance design and functional design in detail or the constraints.
 Identifying the grouping that are functional for minimizing and controlling the
interfaces.
The functional analysis is related to the generation of power and safety, the safety functions
are including the functions that are required for preventing or mitigating the consequences of
the events that are postulated. The functional allocation procedure can receive inputs from the
FRA (Howlett et al., 2015). The experience of the system operating can also be considered
for the allocations that are initial. The human reliability analysis or the PRA assumptions can
be considered for all of the risks that are important for human actions. The vendors that are
constraining on the operations that are physical for any of the components that are considered
on the case by case basis. All of the functions have been assigned in according with the
control that is required for ensuring the proper operation of the plant systems. The
assignments are either automatic machine, human or the shared responsibilities. The
functional allocation determines the actual mean for controlling the identified functions in the
systems. It includes the conditions under which the circumstances occur least and the most,
its features and many more (Mensah, Kakaï and Seifert, 2016). There are limitations of using
a functional analysis that is indirect. A method of collection of information of observational
analysis is to use a chart that is based on time. In this time chart, one of the marks has been
made in the cell that is appropriate in order for indicating the period of time in that a specific