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Donner Company
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Donner CompanyDonner Company
Raw Materials
Preparation
Image transfer
Fabrication
Information
Process Flow DiagramProcess Flow Diagram
Artwork Generation Inspect & Shear
Punch Tooling Holes
WIP
Manual Drill CNC Drill
Metallization
DFPR
WIP
Electroplate
Strip DFPR
Etch and tin strip
Solder mask
Punch Press CNC Router
Solder Dip
Inspect, Test Pack
Issues Faced by Edward PlummerIssues Faced by Edward Plummer Late Delivery by 9 daysLate Delivery by 9 days Return of boards 3% of which 90% were due Return of boards 3% of which 90% were due
to improper process completionto improper process completion ¼ orders interrupted because of client calls¼ orders interrupted because of client calls Poor inspectionPoor inspection
Order size on CNC drillOrder size on CNC drill
Order size = (240-15)/(.08*500-.004*500)Order size = (240-15)/(.08*500-.004*500)
= 6= 6
On CNC router = (150-50)/.5On CNC router = (150-50)/.5
= 200= 200
Capacity utilization Capacity utilization
Dry Film Photo resist : (144+1440+144) = 28.8 hoursDry Film Photo resist : (144+1440+144) = 28.8 hours
Total available time = 21*8 = 168Total available time = 21*8 = 168
Capacity utilization = 28.8/168 = 17.1% Capacity utilization = 28.8/168 = 17.1%
Set up time : = 300 + 1200 + 1200 = 45 hoursSet up time : = 300 + 1200 + 1200 = 45 hours
Capacity lost in set up = 45 / 168 = 26.78%Capacity lost in set up = 45 / 168 = 26.78%
CNC Drill:CNC Drill:
Capacity Utilization: (9650/(60*168)) = 95.73%Capacity Utilization: (9650/(60*168)) = 95.73%
CNC Router:CNC Router:
Capacity Utilization: (2166/(60*168)) = 21.48%Capacity Utilization: (2166/(60*168)) = 21.48%