Page 28 - IJTSRD.com - Special Issue - 2nd International Congress of Engineering

International Journal of Trend in Scientific Research and Development (IJTSRD) ISSN: 2456-6470
nd
Special Issue of 2 International Congress of Engineering
. 1 (  645 ) 2 ) 5 . 0 ( * ) 5 . 0 ( *  67 . 65
n      67 . 65  68
 . 0 ( 10 ) 2  . 0 01


The study indicated that for the investigation of the
production process, using 90% of reliability and 10%
of allowed error, 68 observations or time takings will
be needed for the investigation.

Once we know how many observations will be made,
we took the time it takes each of the 3 processes with
the 2 pieces (product A and product B) and these were
the results obtained:

 Milling: part A takes 6.71 minutes and part B Figure 2. SIMPLEX® PHP main screen
takes 8.71 minutes
Then Figure 3 shows the entry of the variables into
 Production time is 480 minutes. the PHP SIMPLEX® program.

 Turning: part A takes 8.71 minutes and part B
takes 10.71 minutes. Its production time is 480
minutes.
 Finishing finish: part A takes 11.71 minutes and
part B takes 13.71 minutes.
 Its production time is 480 minutes.

 Part A is known to earn $ 100 and part B earns $
125.

For the phase of modeling, and taking the variables
that lead to the process, the mathematical model was
then formulated. The mathematical model was as
follows:

: 100 + 125 Figure 3. Example of input variables in PHP

6.71 + 8.71 ≤ 480 SIMPLEX®

8.71 + 10.71 ≤ 480

11.71 + 13.71 ≤ 480 The program helps to see how the problem is solved

, ≥ 0 either directly or only the last result. For space saving,

the last table of the final result is shown in figure 4.
Where part A will be the variable x1 and part B will
be x2. The mathematical model remained with two
variables and three restrictions, due to the processes
by which the two products pass.
For the resolution phase of the model, the PHP
SIMPLEX® tool was used, because it is a free and
easy-to-use software for solving operations research Figure 4. Final solution in PHP SIMPLEX®
problems. Figure 2 shows the main screen and the
entry of the two variables and three restrictions. The results of the problem are: Production of piece A
equal to 0, production for piece B 35.01 products and
maximum gain is $ 4376.36.

@ IJTSRD | Available Online @ www.ijtsrd.com | Special Issue Publication | November 2017 P - 6