This type of functional analysis was created in the 70s as a result of work carried out in parallel in Germany (the work of Professor Kohler). Its purpose is to analyze the physical principles of operation, technical and physical contradictions in technical objects (TO) in order to assess the quality of the adopted technical solutions and propose new technical solutions.
Methodology
At the same time, the following methods are widely used:
- Heuristic techniques, that is, generalized rules for changing the structure and properties of maintenance; At present, data banks have been created both on intersectoral heuristic techniques and on private ones used in individual industries; a great contribution to the solution of this problem was made.
- Analysis of the consequences of general laws and particular laws of the development of maintenance; these laws, in relation to various branches of industry, are established by the works.
- Synthesis of chains of physical effects to obtain new physical principles of maintenance operation; Currently, there are software products developed by UK researchers that automate this process.
FSA or FMEA analysis
The first stage of the FFA is similar to the first stage of the FSA or FMEA analysis. Usually, FFA is carried out in the following sequence:
The problem is formulated.
The results of the FSA or FMEA analysis can be used to formulate it. A description of the problem should include the purpose of maintenance. The conditions of its operation and technical requirements for maintenance. The formulation of the problem should contribute to the disclosure of creative possibilities and the development of imagination to find possible solutions in a wide area.
Therefore, when describing the problem. It is necessary to avoid special terms that reveal the physical principle of operation and the design and technological solutions used in the prototype.
A description of the functions of the purpose of maintenance is compiled.
The description is based on the analysis of consumer requests and should contain a clear and concise description of the technical object with which it is possible to satisfy the need that has arisen. To understand the functions of the purpose of maintenance. It is necessary to give a brief description of the super system, i.e.
The system that includes the designed maintenance; the description of maintenance functions includes: the actions performed by the maintenance, the object to which the action is directed, and the conditions for the operation of maintenance for all stages of the maintenance life cycle.
Analysis of the maintenance super system is carried out
The supersystem also includes the external environment in which the to in question functions and interacts with it. Analysis of the super system is carrying out using a structural and flow model of maintenance. In this case, it is advisable to use heuristic techniques, for example, to consider whether it is possible to perform the function of the maintenance in question by making changes to adjacent objects of the supersystem.
Whether it is possible to partially or completely transfer the performance of some functions of the maintenance in question to any adjacent object of the supersystem. What prevents the necessary changes from being complete, and whether it is possible to eliminate the interfering factors.
A list of technical requirements for maintenance is compiled.
This list should be base on an analysis of consumer requirements. At this stage, it is advisable to use the techniques of the following technology for deploying quality functions.
A Functional analysis model of maintenance is usually built in the form of a functional and logical scheme. The physical principles of operation for maintenance functions are analyze. Technical and physical contradictions for maintenance functions require to determine. Such contradictions arise between the technical parameters of maintenance when trying to simultaneously satisfy several requirements of the consumer:
Methods of resolving contradictions and directions for improving maintenance are determined.
In order to realize the totality of consumer properties of the object. It reflecting in its Functional analysis model. With the help of a minimum number of elements.
The model may transforming into a functionally ideal one. The search for options for technical solutions is often carried out using morphological tables.
At the last stage of FFA, it is recommended to build graphs, equivalent schemes, and mathematical models of maintenance. It is important that the model is productive, i.e., allows you to find new possible solutions. All initiative and creativity are welcome. It is advisable to start the formation of a morphological table. When several propose solutions for various Functional analysis elements of maintenance appear.
The use of FFA makes it possible to improve the quality of design solutions. Create highly efficient samples of equipment and technologies in a short time and thus ensure the competitive advantage of the enterprise.