Optimizing The Technological Process

Since in accordance with IDEF0 there is a methodology of functional modeling, the name of the block describing the function must be a verb or a verbal turn. For example, the name of the “Execute Check” block means that a block with this name turns unverified parts into checked ones. After assigning a name to the block, the input, output and control arrows, as well as the hands of the mechanism, are attached to its respective sides, which determines the visibility and expressiveness of the IDEF0 block image.

Semantics of blocks and arrows of functional models in IDEF0

To ensure the accuracy of the model, the standard terminology should be used. Blocks are called verbs or verbal turns, and these names are preserved when decomposing. Arrows and their segments, both separate and connected in a “bundle”, are marked with nouns or turns of the noun. Segment labels allow you to specify the data or material objects transferred by these segments, with the compliance of the branching and merging syntax.

The ASTPP model, was modified to solve the above task of optimizing inter-shop technological routes, namely, a new task of optimizing technological routes was added, which includes a number of important activities necessary for conducting technological preparation of production. Functional model to develop the method for optimization of shop-to-shop process routes of manufacture of GTE parts and assembly units based on application of neural networks and graph theory structural models

System-technical methods of optimization of technological routes

In the procedure of designing technological processes, the problem of choosing the most rational technological process often arises from the point of view of some optimization criterion. The solution of such optimization problems becomes possible with the use of systems for the automation of process design in the ASTPP. These systems, along with a significant reduction in design time, can significantly improve the quality of design solutions through optimization at all stages of technological design.

Application of methods of optimization of technological routes in ASTPP. There are three types of methods for optimizing the technological process:

1. Structural.
2. Parametric (one-and multi-criteria).
3. Structure – parametric.

To solve optimization problems, not only one-criterion, but multi-criteria optimization methods are used. Multicriteria structural optimization of technological processes can be carried out using various methods of mathematical modeling : the theory of statistical decisions and game theory, dynamic and linear programming, the use of expert systems, genetic algorithms, artificial neural networks and fuzzy logic methods, as well as other methods of system engineering design. In mathematical analysis, various optimization methods can be used to perform this kind of work. In conditions of application of artificial intelligence tools for optimization of technological processes, the named lists of methods can be summarized as follows

The classical method of differentiation

• linear programming;
• quadratic programming;
• dynamic programming.

From the point of view of the optimal search strategy, four groups of methods can be distinguished:

• analytical;
• recursive;
• iterative;
• stochastic.