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INTRODUCTION
Given that the main objective of this lab is to evaluate and improve a current work method to assemble pens, a detailed motion study was conducted, followed by a time study in order to determine the average assembly time per piece. ... Description of the current assembly method
The assembly method is divided into eight operations that can be subdivided as follows:
1) Get shell with the left hand, given that the right hand is idle, as follows:
a) Reach the shell positioned at a distance of 4” with the left hand. ... Collecting data:
In order to calculate the time needed for each operation the following cases were adopted:
• Consider case B for all operations since one can reach any components in a box. ...
• Consider case B for the move operation when moving back to the original position
• Consider case A when assembling the ink recharge and the shell or the front cap and the partially assembled part. ... Posting the results:
Figure 4:Operator process chart for the first method
DETAILED TIME STUDY
The time needed for each operation was rated. Following the same work method technique, the assembly of a pen was divided into 6 operations rather than 8. ...
We performed a time study for 200 pens, each operator rating the corresponding time. We found that on average the cycle time for assembling a pen is 5. ... 103
PROPOSAL OF AN IMPROVEMENT METHOD
1. Description of the layout
Given that a pen is composed of 4 components as in Figure 1, an improved method was suggested in order to decrease the average assembly time of a pen. ... Note that both hand will start at the same time, thus performing the following sub operations:
a) Reach shell and ink recharge, each in a different hand. ... Operator process chart
Using Tables 1,2,3,4,5 and 6 in Appendix A, we considered the same cases mentioned in the motion study of the current work method in order to derive the cycle time for assembling a single pen as described by the operator process chart in Figure 6.
Approximate Word count = 1491
Approximate Pages = 6
(250 words per page double spaced)
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