**4. Application: process of cutting the electric cables**

It is difficult to imagine modern cars without electronics. Computer board, control lamp, reversing sensors … were designed to increase the comfort level and safety of the motorist. Electrical motor, the intensities being involved cover a range of about 0.5 A, a dashboard light bulb and up to several hundred amperes for a starter. But, any short circuit involves very high currents and can easily set fire to the vehicle and cause severe burns on contact elements short circuit.

In this paper, we propose a methodology for multicriteria optimization criteria considered essential to establish the correct ordering of the machines to avoid the loss of time and minimize the rate of waste and waste (**Figure 2**).

#### **4.1 The analytical hierarchy process to ranking criteria scheduling**

In the process of cutting the electric cables, we have identified six criteria:


**Step 1:** structure combination of scheduling criteria (**Figures 3** and **4**) **Step 2:** Pairwise comparisons of the elements of each hierarchical level with respect to an element of higher level

**Figure 2.** *Cut marking process flow chart setting.*

#### **Figure 3.**

*Hierarchical structure of scheduling criteria.*


#### **Figure 4.**

*Pairwise comparison of criteria.*

*Optimization Multicriteria Scheduling Criteria through Analytical Hierarchy Process… DOI: http://dx.doi.org/10.5772/intechopen.96557*

The pairwise comparison of criteria by the matrix above has identified the choice of the decision maker on the degree of importance of each criterion. For the decision maker, the most important criterion is "cost of upgrading waste", and the test that has no great fatality of the decision of the prioritization of scheduling criteria machines is "production technology".

#### **Figure 5.**

*Eigenvector of the criterion L1. The alternative is the most important criterion L1" qualification of workers", is C2 "Awareness use of safety rules" how long has the value of the eigenvector is greater.*

#### **Figure 6.**

*Eigenvector of the criterion L2. The alternative is the most important criterion L2" qualification of workers", is then C2 "Awareness use of safety rules" how long has the value of the eigenvector is greater.*


#### **Figure 7.**

*Eigenvector of the criterion L3. For the eigenvector criterion L3 "equipment performance" alternative C4 "location of carts and reels", is the largest, and the criterion C2 is also essential according to the criterion L2.*

**Step 3:** Determination of the relative importance of elements by calculating the eigenvectors corresponding to the maximum eigenvalue of comparison matrix (**Figures 5**–**10**):

**Step 4:** Check the consistency of judgments. All judgments are consistent (**Table 3**)

**Step 5:** Calculation of performance


#### **Figure 8.**

*Eigenvector of the criterion L4. For the eigenvector criterion L4 "scheduling equipment", alternative C3'number of maintenance" is the essential.*

#### **Figure 9.**

*Eigenvector of the criterion L5. The alternative of C4" location of carts and reels", is considered essential and priority according to the criterion L5.*


#### **Figure 10.**

*Eigenvector of the criterion L6. For the eigenvector criterion L6" cost of upgrading waste ", then, the alternative of C4" location of carts and reels", is considered essential and priority.*

*Optimization Multicriteria Scheduling Criteria through Analytical Hierarchy Process… DOI: http://dx.doi.org/10.5772/intechopen.96557*


**Table 3.**

*Judgment consistency ratios.*

#### **Figure 11.**

*Prioritization of scheduling criteria ranking.*

Prioritization method AHP has established the classification scheduling criteria as follows (**Figure 11**).

The decision maker considers that the scheduling criteria L6 is a priority to set up an optimal schedule.
