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February, 2017
Convolution of the BOM: How Much Could a Resistor Cost?
Continued from page 34
ufacturing software. The BOM is sent to the strate-
gic ops manager to determine which of the global sourcing directors are needed to negotiate the pricing for the PCB and the resistor. Two are needed because PCBs usually have a unique commodity code. The BOM is imported into the ERP software which only accepts the attributes of quantity, price, description, manu- facturer, manufacturer’s part num- ber, and alternates, with the rest of the engineering data often omitted. Once the price negotiations are com- plete, orders are placed, and docu- ment control is instructed to provide the PCB specifications to the win- ning fabricator. Following the resolu- tion of all EQs, the single resistor and the PCB are received, inspected, and inventoried.
Contract Manufacturing The strategic ops manager now
See at APEX, Booth 2334 and at ATX West, Booth 1160
directs global sourcing to select a con- tract manufacturer with the right technical capabilities. The parts kit is pulled from inventory and shipped to the supplier. The CM receives a copy of the BOM from the ERP system, but (since the kit was provided) much of the purchasing data is not relevant. The data columns needed by the CM are in the original CAD design pack- age, which is stored in the customer’s manufacturing system. The CM’s CAM engineer is put in contact with the customer’s document control. It is determined that document control has a BOM with reference designator, value and tolerance, but does not have the CAD file containing the package,
DISPENSE WORKS INC Benchtop Assembly Solutions
Vision system with up to 4 cameras Multiple pick & place heads Corrects for X, Y and Theta (rotation) Assembles chip with controlled force Z height probe / XYZ calibration Great for low volume / high mix
Ultra precise adhesive dispenser option Universal vacuum tooling Optional tool changer (8 position)
Network (LAN), RS-232 & Dual USB Ports Gerber, DXF, G-code, PLT, etc. Direct input Windows Software Suite graphical setup
SMT Production System with Vision
x/y location, and rotation that are needed for programming an SMT ma- chine. These must be procured from design engineering. It is also determined that docu-
ment control does not have the stencil file from the PCB vendor as it was not requested by global sourcing. The CM now becomes the “integrator” request- ing the data they need from each of the groups within the OEM and dealing with the various software packages used by each department. To be suc- cessful, the CM must assemble a BOM that has all the columns required to build the product by merging the de- sign and CAD BOMs with the manu- facturing and ERP BOMs. This satiric convolution of the
BOM is created by the use of specific software systems within each operat- ing department and exacerbated by the absence of a high level integra- tion system that can deal with the separate software systems and their unique extracts. The simplicity of a single engineer managing an entire project is lost in this compartmental- ization of product data. The irony is that an outside resource, the CM, now emulates that simplicity by act- ing as the “de facto” single engineer. Contact: DIVSYS International,
LLC, 8110 Zionsville Road, Indi- anapolis, IN 46268 % 317- 405-9427 E-mail:
sales@divsys.com Web:
www.divsys.com r
Note: This story first appeared in a shortened form in the December 2016 issue of U.S. Tech. In order to provide the necessary context for the article, we have chosen to republish it in its entirety.
Made in the USA
www.dispenseworks.com • 815-363-3524 •
info@dispenseworks.com 7:59:26 AM
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