Framework for a Closed Control Loop Between Supply Chain Segments and Production Line Dennis 1
1 Bauer ,
Florian
1 Maier ,
Bernd
2,3 Waschneck
Fraunhofer IPA, Stuttgart // 2 GSaME, University of Stuttgart // 3 Infineon Technologies AG, Munich
[email protected], Phone: +49 711 970 1355
Power Semiconductor and Electronics Manufacturing 4.0
Concept
Motivation Current production planning systems are not designed to adapt to changes in supply chain networks, like unexpected change in customer’s demand, automatically and in real-time. Semiconductor manufacturers are forced to react on those events with non-automated procedures, large inventories and long lead times. Therefore, decisions are unnecessarily delayed and corrective actions in semiconductor wafer processing, often called frontend, may take place too late. Thereupon, we identified the need for a technical solution to automate and accelerate decision making in complex production environments, considering multiple aspects like product mix, time-coupling and on time delivery.
Bauer et al. „Concept and possible application of an automated framework to influence production dispatch based on supply chain events”, International Conference on Industrial Engineering and Systems Management (IESM), Saarbrücken, 11. – 13. Oktober 2017
Information Flow
Benefits Cycle Time Spread reduction = inventory reduction
To decrease inventory levels, production needs to be stable and reliable. The instability is measured by the Cycle Time Spread (CTS), which is defined as follows:
CTS [days] = Quantile(CT, 95%) – Median(CT) CTS[%] = CTS [days] / Median(CT) Typical semiconductor CTs are about 30 days with a CTS of 15% or 4.5 days.
Roadmap Fully-automated concept as goal and vision Decision support as intermediate solution
Intermediate Solution Prototype
With Flow Factor variations of 10% (~ 3 days) the CTS can be reduced by up to 66%. With an average time of 20 days on the die bank, the die bank inventory level could be reduced by up to ~15% , because less safety stock is necessary to account for variations in production.
The project SemI40 is co-funded by grants from Austria, Germany, Italy, France, Portugal and the ECSEL Joint Undertaking and is coordinated by Infineon Technologies AG
Prototype Execution Decision Context
ADC Concept
Manual Semi-Auto. Automated
Intermediate Solution Manual Automated
ADC Concept Automated
Project Coordinator:
[email protected] Project Manager:
[email protected] Infineon Technologies Austria AG Siemensstraße 2 9500 Villach Austria
