Modern Methods For Manufacturing Planning And Scheduling (Page 4 of 5) in pdf

The final result for selling the items of ‘BX’ series is shown in “fig. 9”. In

this case the orders are also going to be delayed. The result does not

satisfy the demand. On the figure is also shown, that in certain time, the

whole production starts to delay. Thanks to the visual result, provided

from ’Asprova’, manufacturer can trace back along the production line

to see in which moment the production is slowed, and to take measure.

The graph shows that the production starts to delay at the moment of

the inspection of the assembled ‘BX’ items (fig. 9).

Figure 11. Resource Gantt chart after optimization

Applying the ‘Local Search’ algorithm method and using the

“Asprova” function “Operation split size”, led to optimizing the

production model and setting every order to be done on time. The

end date for the last order (BX100) is until 2016/06/21 00:00

o’clock (fig.12). Thanks to this optimization the production schedule

fit perfectly to the due date plan. The schedules are generated for

Figure 9. Gantt chart for selling the constructions with Shaft-B

every workcenter or process, according to the manufacturing plan,

4. USING ‘ASPROVA’ FOR OPTIMIZING

for the whole production period.

THE PRODUCTION SCHEDULES

The final results that the simulation from ‘Asprova’ shows is not always

the optimum, since some orders are not going to be done on time.

That is why it is necessary, after the final model of the production

is ready, to perform additional optimization for finding the best

possible solution.

The optimization of the production model is based on ‘Local Search’

algorithms. The objective of the optimization is to fit the requested

due dates for every one order. The function that is going to be used,

from the ‘Asprova' program, is operation split size (fig.10). What the

function does is a splitting the operation, if the operation quantity

is larger than a specific value. Like ‘Local Search’ algorithms, a

number of tests will be done, until the wanted result is achieved.

The new data is added into the operation split size column of the

‘Item table’ [fig.10].

Figure 12. End time of the final order in the simulation model of production

5. CONCLUSION

On the market there are a lot of different software products that can be

used for planning and scheduling purpose. Such products are:

• EnterpriselIQ Scheduling;

• Synchro PRO;

• Resourse Manager DB;

• SMARTer Manager;

• Orchestrate Scheduling;

• Planvisage SCM;

But those 3 APS systems mentioned in the paper have been studied

because of their relative good availability.

Presented modern management methods for planning and scheduling of

production processes are reliable, easy and allow quickly dealing with

certain problems. Scheduling of the company's orders is displayed in

Figure 10. Using operation split size function in ‘Asprova’

three different software products. Through the visual presentation of the

The parameters “Operation split size MAX” shown on ‘fig.10’ presents

results, it was found that production will not be executed on time and

the final quantity that is going to be used for optimizing the production

where in fact began the delaying of the production process.

model. This quantity is achieved after several numbers of simulations

Using the software "Asprova" and its built-in features, optimization is

runs using different input data. The function was applied for larger

performed on the results. The optimization led to rapid resolution of the

processes (manufacturing Shaft-A, B and C). Optimized Gantt chart is

problem of the late work. Generation of production plans allows the

shown on ‘fig.11’.

manufacturing processes to start immediately.

| 2015 | OCTOBER |

638

SCIENCE JOURNAL

Modern Methods For Manufacturing Planning And Scheduling Page 4

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