**3. Integration role of CAD technologies in PLM, including in maintenance management**

The modern production is founded on using information science and communication technologies as CALS-technology (continuous acquisition and lifecycle support) or PLM-technology (information support of the product lifecycle management processes). PLM is an approach to designing and producing high-tech and scientifically based product, using information science and computer technology at all stages of the product life cycle [13].

This aspect actual in condition of developing countries, like Uzbekistan, where using these technologies is innovative process in production. One of the problems in this process is adapting them in production, that is, translating the engineering data to PLM system, by way of integrating PLM and CAD/CAE/CAM systems, using the product's engineering database at the base of PDM-technology (product data management).

The product's engineering data are possibly divided into three groups: structural (constructional), functional, and technological. Let me present to you the structural data, which we can call the geometric data, that are necessary for integrating CAD and PDM systems. The product's geometric data are used not only in enterprise where they are produced but at all stages of the product life cycle from designing to maintenance. So, creating the geometric database, using different forms of the geometric data (**Figure 9a**), is very important in the product life cycle.

As is well known, the product lifecycle includes the period from origin necessity for creating the product up to its liquidations in consequent exhaustion of consumer characteristic. Primary stages of product life cycle are selecting four main stages: designing, producing, maintaining, and utilizing.

Though life cycles of old and new products always form the unceasing cycle, because of brightly not images, traditionally life cycles of each product were considered separately, which during the initial stage was designing but finally cutting. However, author, founding on his conducting researches, offers to consider that

#### **Figure 9.**

*Types and levels of geometric data (a). Integration role of geometrical modeling system in PLM (b).*

that beginning of PLM is from creation an instrument from stone, bones and wood by primitive man. Since no one can reject that the base of modern industrial robot is an instrument of the stone age, the end of "old" product is a beginning of "new" product. It is possible to say that the beginning and the end of PLM connect with beginning and end of mankind on land. The present production conditions, in which production design steel play one of solving roles, relationship between "old" and "new" product lifecycle become reveals itself all more brighter. Coming from author's offers separate stage of the designing on two: conceptual and engineering design. Conceptual design stage is founded on the basis of geometric modeling and it is the closing stage of the product life cycle, having a causal relationship between "maintenance-utilizing" and "designing" stages. Nowadays, producing geometric modeling has become a primary method, facilitating designing. In this stage, the product will be designed on the basis of the relationships between exhaustion of consumer characteristic of old product and necessity for creating the new (innovative) product.

The need for geometric data arises at all stages of the product life cycle, particularly in the initial stage—"conceptual design" stage, when it is very high. Created at this stage, geometric database is directly or indirectly used also in the other stages of the product life cycle, by integrating CAD and PDM systems. It is necessary to note that the need to create a "new product" is basically formed in the maintenance of "old" product. Since it at this stage is not only used Geometric data of "old" product in maintenance but arises Geometric data of "new" product in designing.

As example, we shall consider creating the agricultural machinery tools' geometric database, which is necessary to enterprises that participate in these products life cycle [14]. Creating this database needs the review, classification, and analysis of appropriate information about agricultural machinery tools from a geometric standpoint. This will allow us to reveal general and individual geometric features of these tools that assist in an efficient management of product data for all participating enterprises in this process (**Figure 9b**). At present, the author is the leading researcher on development of theoretical bases and applying aspects of the geometric modeling of agricultural machinery tools. With the results from research, models, algorithms, and methods of designing these tools with mold board surface by geometric modeling were worked out.

**33**

*Decision Maintenance Management Problems in Agriculture Engineering by Constructive…*

*DOI: http://dx.doi.org/10.5772/intechopen.81969*

**Proposed design on advantage**

**Influence of geometry on technical and technological characteristics**

> 1.

2. 3. 4. 5. 6. 7.

Influence on earth layer trajectory

Influence on material quantity

Influence on process quality

Influence on flat plugging

Influence on multifunctionality

Influence on manufacturability

Influence on complexity of

construction

Amount of disadvantages "−"

Amount of advantages "+"

Total score Rating place

**Table 4.**

*Screening of model selection process for designing mold board.*

3 4 1 1

4

3

1

2

−2

−1

1

0

1

2

2

2

3

3

1

2

Advantages

−

+

+

0

0

0

−

**B**

−

−

+

0

0

**D**

−

−

−

−

+

+

**EF**

−

−

+

+

−

+

**CDF**

0

+

0

−

0

0

**B**

+

+

−

0

+

−

**BE**

0

+

0

−

0

0

**B**

**A**

**B**

**C**

**D**

**E**

**F**

**Considered constructions**

*Decision Maintenance Management Problems in Agriculture Engineering by Constructive… DOI: http://dx.doi.org/10.5772/intechopen.81969*


**Table 4.**

*Screening of model selection process for designing mold board.*

*Maintenance Management*

that beginning of PLM is from creation an instrument from stone, bones and wood by primitive man. Since no one can reject that the base of modern industrial robot is an instrument of the stone age, the end of "old" product is a beginning of "new" product. It is possible to say that the beginning and the end of PLM connect with beginning and end of mankind on land. The present production conditions, in which production design steel play one of solving roles, relationship between "old" and "new" product lifecycle become reveals itself all more brighter. Coming from author's offers separate stage of the designing on two: conceptual and engineering design. Conceptual design stage is founded on the basis of geometric modeling and it is the closing stage of the product life cycle, having a causal relationship between "maintenance-utilizing" and "designing" stages. Nowadays, producing geometric modeling has become a primary method, facilitating designing. In this stage, the product will be designed on the basis of the relationships between exhaustion of consumer characteristic of old product and necessity for creating the new (innovative) product. The need for geometric data arises at all stages of the product life cycle, particularly in the initial stage—"conceptual design" stage, when it is very high. Created at this stage, geometric database is directly or indirectly used also in the other stages of the product life cycle, by integrating CAD and PDM systems. It is necessary to note that the need to create a "new product" is basically formed in the maintenance of "old" product. Since it at this stage is not only used Geometric data of "old" product in maintenance but arises Geometric data of "new" product

*Types and levels of geometric data (a). Integration role of geometrical modeling system in PLM (b).*

As example, we shall consider creating the agricultural machinery tools' geometric database, which is necessary to enterprises that participate in these products life cycle [14]. Creating this database needs the review, classification, and analysis of appropriate information about agricultural machinery tools from a geometric standpoint. This will allow us to reveal general and individual geometric features of these tools that assist in an efficient management of product data for all participating enterprises in this process (**Figure 9b**). At present, the author is the leading researcher on development of theoretical bases and applying aspects of the geometric modeling of agricultural machinery tools. With the results from research, models, algorithms, and methods of designing these tools with mold board surface

**32**

in designing.

**Figure 9.**

by geometric modeling were worked out.

As a result, information sufficient for creating the geometric database in different forms was accumulated. We shall select the following forms of geometric data: verbal, graphical, parametric, algorithmic, 2D and 3D model, and methodical (that may include all geometric data forms). All elaborations are executed in *AutoCAD 2013* system.
