We have begun to experience a growing backlog of customer orders in the Plasti-Brack product line.
For the last two to three months apparently we have had a slow creep-up of order backlog in the MLD250 department, specifically the Plasti-Brack molding group. It seems that we now have a 5 to 6 week backlog which is entirely unacceptable to our customers. As you know, our customers have been accustomed to getting orders shipped almost immediately or within a week of placing their orders. So now they dont like to have to wait. Jack Walker and I think that this could possibly adversely affect our business since these items are so popular.
It is my opinion that we need more capacity in Machine Group 251. As you know, we have four 250-Ton plastic injection molding machines, which run these six parts. However, lately one of the machines seems to be experiencing excessive downtime. There also seems to be some tool wear causing low productivity. I suggest you talk to Don Stump to get more details on the order backlog and his scheduling system. Talk to Tom Gunner in Engineering or one of his Manufacturing Engineers about the machines and tools. And you should also check with Bill Morton and someone in the Plastic Injection Molding area about the tools. And while you are talking with Bill, ask him about his opinion of capacity. Ask Don Stump his opinion as well.
What I expect you to do consists of three main activities: 1) check out our capacity problem. See what we need to do to increase capacity. There is a capital budget available for the MLD2500 group – see Harvey Lund for more details. 2) We have to get our delivery time down to acceptable levels – see Don Stump for the details. 3) And while you are at, see what you can do to improve productivity and lower our costs. I expect your report in about two weeks with your recommendations and justification.
NEW INFORMATION GATHERED
There is a high reject rate of plastic inserts coming from MG 251, as found in the Plastic-Brack Assy, MG403 it seems to be somewhere between 12% to 20% reject rate, depending on which plastic insert.
You also discover that the molding dies are very old and some of the mold cavities are closed off because of previous poor quality, which further reduces the yield rates from the standard expectations. Dies for P90, P120B, and P135 each have one cavity closed off. Swenson thinks that more should be closed off, based on his expertise and the age of these dies.
New plastic injection molding dies cost $25,000 each, or $30,000 each if they are designed for quick changeover. The lead time for manufacturing these dies by an outside tool and die company is 6 weeks each.
One of the four molding machines, M101, has a record of high unscheduled repair and downtime. It seems to need some minor adjustments several times per week, which is causing low uptime for it. Swenson, the molding supervisor, would like to see the machine have a complete overhaul. Dick Wrangle would like to purchase a new 250-ton molding machine. The cost to overhaul is estimated to $100,000, and the cost of a new machine is $250,000.
Mark Monnin, the Purchasing Manager, tells you that there is better grade plastic resin that could be used, but it is more expensive. The better materials are RP515 at $0.28 per pound or RP625 at $0.30 per pound; the current material in use is RP502 at $0.26 per pound; the quality ranking order is RP625 > RP515 > RP502. Monnin believes the best material, RP625, would reduce some of the scrapped parts generated by MG251. He is not sure how RP515 would do.
Bill Morton, the Plant Manager, informs you that a second shift has not been approved at this time, but could be as a last resort. There is a 15% shift premium paid to those who work on the 2nd shift. Overtime could also be used, possibly 2 extra hours per day and up to 10 hours on Saturdays. OT earns employees an additional half-time for hours over 40 per week.
The setup times (die changeover) in both blanking and molding are in the three and half to four and a half hour range. You asked Tom Tucker what it would take to modify these dies with quick clamps and other mechanisms so that you could reduce the setup times. Tucker said that to modify existing dies would cost about $10,000 each. Your research in this area confirms this number is in the ballpark and that setup times can be reduced to about 0.5 to 1.0 hours.
Harvey Lund indicates that there is a capital budget for MLD250, of which $325,000 is available for MLD251. You can purchase machines, tools, overhauls and tool upgrades with this budget. He also says that you dont need to spend all of it.
Mike Finch, the Marketing Analyst, says that the demand rate of customer orders has not increased substantially in the last quarter, nor does he think that it is going to rise much soon. He still stands by his long term forecast over the next five years.
Assignment
Analyze the situation in the Plasti-brack product line. Diagnose the problem and possible solutions to the capacity and order backlog. Determine an appropriate plan for correcting the problem. Justify your plan and make recommendations using your knowledge of productivity, process improvement, inventory, capacity, forecasting, and quality. Write a report to the VP of Operations.
Expectations
· Explore the possibilities of spending some of the capital budget on a machines and or tools. Also consider improving setup time, improving quality, increasing capacity, and determining EOQs.
· Determine a plan for solving this problem in the Plasti-brack product line. Consider there may be both a short-term solution and a long-term solution.
· Justify your plan based on the concepts of capacity management.
The following is the Income Statement from the year just completed.
Gross Income
COGS
Gross Margin
PRODUCT LINE
(000s)
(000s)
(000s)
Fasteners
$ 1,010
7.3%
$ 646
4.7%
$ 364
2.6%
Cabinet Hardware
$ 3,243
23.5%
$ 1,783
12.9%
$ 1,460
10.6%
Construction Hardware
$ 4,165
30.2%
$ 1,874
13.6%
$ 2,291
16.6%
Decorative Hardware
$ 5,388
39.0%
$ 2,586
18.7%
$ 2,802
20.3%
TOTALS
$ 13,806
100.0%
$ 6,889
49.9%
$ 6,917
50.1%
OPERATING EXPENSES
Marketing and Advertising
$ 850
6.2%
Commissions, Wages & Salaries
$ 1,750
12.7%
Benefits
$ 770
5.6%
Office Expenses
$ 175
1.3%
Depreciation
$ 734
5.3%
Insurance
$ 943
6.8%
Fixed Energy & Utility Expenses
$ 268
1.9%
Miscellaneous
$ 132
1.0%
TOTAL OPERATING EXPENSES
$ 5,622
40.7%
Net Income Before Taxes
$ 1,295
9.4%
The following is the Statement of Inventories (from the Balance Sheet) for the year just ending:
Beginning
Ending
Inventories
(000s)
(000s)
Raw
$ 205
$ 167
Purch Parts
$ 148
$ 151
WIP
$ 389
$ 322
Fin. Goods
$ 242
$ 243
TOTAL INVEN
$ 984
$ 883
NOTES ON INVENTORIES AND MATERIAL MOVEMENT
EMC does not account for inventories on a product line basis. But generally, each product line uses its proportionate share of the inventories based on costs.
Plastic resin is moved to the molding machines where it is dumped into feeding hoppers for each machine. As the hopper empties, additional resin is dumped in.
The plastic parts come out of the molding machines and are trimmed where they are collected in 10 cu. ft. tubs. These tubs are moved to the Plasti-Brack assembly area.
The plain brackets are stamped out by the progressive dies in the Plasti-Brack press machine group. They are also collected in 10 cu. ft. tubs and then moved to the Plasti-Brack assembly area.
In the assembly process, the operator will do a quick visual check of the plastic insert and the plain bracket before assembly. Bad parts are discarded into tubs. The plastic is recycled via a regrind process. The steel parts cannot be used again and sold for scrap with the rest of the scrap metal.
The assembled Plasti-Brack items are collected in 10 cu. ft. tubs and are eventually moved to the Bulk Pack area. Once they are packed, they move into the Finished Goods Warehouse where they wait to be picked and packed in large shipping containers to the customers.
CAPACITY & FORECASTING
Overall, the current capacity utilization at EMC is 92%. This ranges from about 75% in the blanking machine groups to about 93% in the plastic molding groups. Assembly, packaging and packing are near 80%, while the finishing processes are around 88%.
Currently, all departments are running just one 40 hour shift. Occasionally, some departments will add some overtime on a weekly basis as needed to stay up with orders. Bill Morton, the Plant Manager, prefers to run with one shift. His opinion is that adding a second shift is not as efficient since it adds more fixed costs in energy consumption, just to have the lights on. Additional shifts require additional employees. It costs money to hire and train them. Plus employees earn a 15% shift premium. Morton would rather pay the time & a half for the additional hours over 40. And Morton would prefer that his capacity utilization be around 85%. He is a little nervous with the 92% level.
Mike Finch does the forecasting for EMC, both short-term and long-term. His short-term forecast is broken down by product line. His short-term forecast for Plasti-Brack products indicates that there will be a small increase this year of 7% to 10%.
Finch’s long term forecast is across the board for all of EMC and its various products. His results indicate that there will be a 12.5% annual compound growth over the next five years. This equates to an 80% increase over the current demand in the fifth year.
Products: Construction and building items:
FASTENERS
? screws, bolts, nails
CONSTRUCTION
? Flanges
? Brackets Plasti-Brack (see below for more details)
CABINET HARDWARE
? Hinges
? Knobs
? Pulls
DECORATIVE HARDWARE
? Towel Bars
? Towel Rings
? Soap Dishes
? Switch Plates
Outlet Plates
100 Heading
? 101 small headers
? 105 large headers
150 Blanking & Stamping
? 151 small presses
? 153 Bracket presses
? 157 large presses
200 Zinc Die Cast Molding & Trimming
? 201 small zinc molders
? 203 trim, small
? 206 large zinc molders
? 208 trim,large
250 Plastic Injection Molding
? 251 Plasti-brack insert molding
? 253 Hinge insert molding
? 255 Soap dish molding
300 Plating
? 301 Barrel Plating nickel
? 303 Barrel Plating chromium
? 305 Rack Plating
330 Brushing
? 331 Straight line brushing
? 333 Circular line brushing
360 Lacquer
? 361 Spray lacquer line
? 363 Brush lacquer line
390 Painting
? 391 Paint line 1
? 393 Paint line 2
? 395 Paint booth
400 Assembly
? 401 Hinge Assembly
? 402 Hinge Assembly – auto
? 403 Plasti-brack Assembly
? 404 Towel Ring Assembly
? 406 Soap Dish Assembly
500 Packaging
? 501 Bag Packaging
? 503 Bar, Ring, Dish Packaging
700 Packing
? 701 Bulk Packing
The Plasti-Brack Product Line: combination metal / plastic supports
Six products, different angles. F90, F100, F120A, F120B, F130, F135
Novel item patented by Excellent
Unique design includes a simulated wood finish and color in the plastic insert
Allows it to be used both for internal and external construction
Very popular in deck, fence, and shed construction, as well as in home construction.
SAMPLE DRAWING & SAMPLE PROCESS FLOW CHART
Figure 1 shows a sample drawing of the F90. The P90 is the plastic insert, the S90 is the steel bracket and the F90 is the assembly of the P90 and S90. Figure 2 shows the process flow chart for the B-F90, which is the bulk packed F90.