Wyniki wyszukiwania - BazTech

1

Developing and deploying electronics assembly line optimization tools: a Motorola case study

Tirpak T. M.

Decision Making in Manufacturing and Services

|

2008

|

Vol. 2, no. 1-2

63-78

EN

The assignment of workloads to production equipment is one category of planning decision for an electronics assembly factory. In practice, line balancing requires not only selecting machines with sufficient placement accuracy and feeder capacity, but also addressing a host of other operational objectives and constraints. Motorola Labs led a multi-year effort to apply mathematical programming to balance a variety of production mix and volume scenarios. By representing the optimization problem as a specially structured, mixed linear-integer program, we were able to incorporate a high degree of reality in the model, simultaneously optimizing fixed setups, handling custom parts, maximizing machine uptime, and mitigating secondary bottlenecks. This paper presents the story of how we developed and deployed a software solution that significantly improved assembly cycle times, setup changeovers, and overall factory productivity, saving the company tens of millions of dollars.

2

A Distributed Decision-Support System for Virtual Prototyping

Tirpak T. M., Lach L. E., Xiao W., Lopez J. M.

Decision Making in Manufacturing and Services

|

2007

|

Vol. 1, no. 1-2

137-152

EN

Virtual Prototyping (VP) is a data-driven design process that promotes both knowledge reuse and innovation. High-profile applications in the automotive and aerospace industries have demonstrated its potential to significantly reduce prototype cycles, time to market, and total product cost. This paper addresses VP as a specialized application of Decision-Support Systems, and discusses common requirements for engineering design tools, as well as requirements specific to the design of electronic products, such as mobile phones. Motorola Labs' test bed for VP is introduced in terms of its open, agent-based architecture utilizing Java CORBA. One of the key principles of the VP System is the reuse of expert knowledge across multiple engineering domains. This is highlighted via several use cases, showing that the system can function not only as an Intranet-accessible repository of model services but also as an integral part of decision-making within the native CAD environment.

3

Configuring and scheduling of surface mount technology lines

Kaczmarczyk W., Sawik T., Schaller A., Tirpak T. M.

Automatyka / Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie

|

2003

|

T. 7, z. 1-2

129-139

EN

Surface mount technology (SMT) is currently the most widely adopted technology for the manufacture of printed wiring boards. A typical SMT line consists of several assembly stations in series and/or parallel, separated by finite intermediate buffers. A typical measure of the performance of an SMT line is its throughput, e.g., number of placements per hour, which depends the equipment in the line, the line configuration, the product to be assembled, and the balance of the workloads assigned to each piece of equipment. This paper discusses the interrelation between the decisions problems for configuring, balancing, and scheduling an SMT line, and proposes a method for using scheduling results to improve the line configuration. A fast scheduling heuristic is introduced, and applied for reconfiguring two real-world SMT lines to maximize throughput for a single type of product.

PL

Technologia montażu powierzchniowego jest szeroko stosowana w produkcji obwodów drukowanych w przemyśle elektronicznym. Typowa linia montażu powierzchniowego składa się z kilku szeregowo połączonych stacji montażowych z maszynami równoległymi i buforami międzyoperacyjnymi o ograniczonych pojemnościach. Podstawowym kryterium jakości pracy linii jest jej produktywność mierzona liczbą części elektronicznych montowanych w ciągu godziny. Liczba ta zależy od zastosowanych maszyn, typów montowanych kart elektronicznych oraz konfiguracji linii i jej zrównoważenia. W pracy omawia się wzajemne powiązania pomiędzy problemami decyzyjnymi związanymi z konfigurowaniem, równoważeniem i harmonogramowaniem linii. Zaproponowano metodę, w której wyniki harmonogramowania wykorzystuje się do ulepszania konfiguracji linii. Przedstawiono szybką heurystykę, którą zastosowano do skonfigurowania dwóch rzeczywistych linii do montażu powierzchniowego pojedynczych typów kart elektronicznych w celu maksymalizacji produktywności linii.