Activité pratique: demander / indiquer le cheminFull description
Full description
12121
HW Template
ceramic examination
Florinda Donner's first book entitled: Shabono. Ensure you have your own physical copy of this book. To purchase visit: http://www.amazon.com/
1. On which dimensions does Donner compete? What kind of process have they adopted? Why? What are the consequences of the recent quality and lead time problems? Donner competes on Delivery Speed and Flexibility dimensions. dimensions.
2. Flowchart the physical process flow for a typical order. Discuss also the information flows required to operate such a process. 3. Consider the drilling stage. For any particular order size, which drilling technology would you use: the CNC drill or the manual drill? (Assume that orders cannot be split on multiple machines.) Similarly, what order size policy would you institute at the profiling stage? How do your proposed policies compare to the current practice? Explain why there is a difference, if any. 0.08 * 6
4. Use the donner.xls Excel model to study the throughput times of various order sizes. How do they compare to Donner's quoted lead times? What type of order is the most profitable? Quoted lead times : delivery in 3 weeks for < 1000 boards and 5 weeks for larger orders. Orders shown in orange require more time than quoted. It is seen that manual drill for large orders of 800 or more is not efficient in terms of time. Large orders are most profitable, especially when using CNC drill and CNC Router profile.
5. Assume 21 days per month and an 8-hour shift. Identify t he bottleneck based on September's utilization of each stage of t he process. Utilization can be computed as (time required)/(time available). What is the impact of the bottleneck on the plant's total throughput? Why do you think some utilization factors are greater than 100%? 6. What specific actions should Mr. Plummer take to solve Donner's lead time and quality problems? Think beyond the bottleneck (and in particular beyond questions 3 through 5) and consider also Donner's business strategy.
In your analysis, assume that Donner operates 1 shift of 8 hours per day, 5 days a week and that September had 21 days, i.e. 168 hours. Also, note that footnote (c) in Exhibit 2 indicates that the setups for the CNC drill and CNC router can be performed offline, which means that the CNC drill can be processing one order while the setup for t he next order is being performed simultaneously.
s etu p run ti me time per board ( in mi n ( in mi n)
8
8
8
number of circuit boards per order 8 40 40 40 40 12 0
Artwork Ge neratio n Inspect & Shear Drill Tooling Hole s
29 20 10
0.000 0.063 0.063
29.0 20.5 10.5
29.0 20.5 1 0.5
2 9.0 20.5 10.5
2 9.0 20.5 10.5
15 240 10
40.000 2.000 0.094
335.0
335.0
10.8
5 20 20 25 5 10
0.025 0.250 0.025 1.063 0.025 0.025
45 30 50 150 45
29.0 22.5 12.5
29.0 22.5 12.5
29.0 22.5 12.5
29.0 22.5 12.5
10.8
256.0 10.8
256.0 10.8
1615.0
1615.0
13.8
5.2 22.0 20.2 33.5 5.2 10.2
5.2 22.0 20.2 33.5 5.2 10.2
5.2 22.0 20.2 33.5 5.2 1 0.2
5.2 22.0 20.2 33.5 5.2 1 0.2
0.188 0.063
46.5 30.5
46.5 30.5
46.5 30.5
1.000 0.500 1.500
58.0 154.0 57.0
154.0 57.0
29.0 27.5 17.5
29.0 27.5 17.5
29.0 27.5 17.5
29.0 27.5 17.5
13.8
320.0 13.8
320.0 13.8
4815.0
4815.0
21.3
6.0 30.0 21.0 67.5 6.0 11.0
6.0 30.0 21.0 67.5 6.0 11.0
6.0 30.0 21.0 67.5 6.0 11.0
6.0 30.0 21.0 67.5 6.0 11.0
46.5 30.5
52.5 32.5
52.5 32.5
52.5 32.5
58.0
90.0 105.0
170.0 105.0
170.0 105.0
--------- --------- --------- ---------
---------
29.0 70.0 60.0
29.0 70.0 60.0
29.0 70.0 60.0
29.0 70.0 60.0
21.3
480.0 21.3
480.0 21.3
32015.0
32015.0
85.0
8.0 50.0 23.0 152.5 8.0 13.0
8.0 50.0 23.0 152.5 8.0 13.0
8.0 50.0 23.0 152.5 8.0 13.0
8.0 50.0 23.0 152.5 8.0 13.0
52.5 32.5
67.5 37.5
67.5 37.5
67.5 37.5
90.0
170.0 210.0 225.0
225.0
---------
---------
29.0 82.5 72.5
29.0 82.5 72.5
29.0 82.5 72.5
29.0 82.5 72.5
40015.0
40015.0
85.0
1840.0 85.0
1840.0 85.0
103.8
103.8
2240.0 103.8
2240.0 103.8
25.0 220.0 40.0 875.0 25.0 30.0
25.0 220.0 40.0 875.0 25.0 30.0
25.0 220.0 40.0 875.0 25.0 30.0
25.0 220.0 40.0 875.0 25.0 30.0
30.0 270.0 45.0 1087.5 30.0 35.0
30.0 270.0 45.0 1087.5 30.0 35.0
30.0 270.0 45.0 1087.5 30.0 35.0
30.0 270.0 45.0 1087.5 30.0 35.0
67.5 37.5
195.0 80.0
195.0 80.0
195.0 80.0
195.0 80.0
232.5 92.5
232.5 92.5
232.5 92.5
232.5 92.5
170.0
850.0 550.0 1245.0
550.0 1245.0
850.0
1050.0 650.0 1545.0
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IMAGE T R A N S F E R
Drilling Manual CNC drill Metaliza tion Dry film photoresist 1. Panel Prep 2. La mina te & Exp ose 3. Develop Ele ctro pla te Strip DFPR Etch & Tin Strip FABRICATION
So ld erma sk Solder Dip Profiling Punch Press CNC Router Ins pe ct, T es t, p a ck
