From MRP Nervousness to Shop Floor Schedule Nervousness in the Industry 4.0 Era

RODRIGUEZ, MARIA ANALIA; JUAN MATIAS NOVAS

Jornada; Jornadas Argentinas de Informática JAIIO 2023; 2023

In the context of Industry 4.0 (I4.0), manufacturing systems are shifting fromnonflexible to dynamic, self-aware and self-adaptable ones. Thus, schedulingsystems, as a core of production functionality, are turning online, context-awareand responsive. Nevertheless, even when immediate responsive actions are performed when facing disruptions, aimed at getting a new feasible and/or goodquality solution, this adaptation-to-change response mechanism might not bewell accepted on the shop floor. This is mainly because, repeated changes couldlead to a continuous rearrange of predefined manufacturing plans, through different levels, from MRP to the control systems. Traditionally, this behavior isknown as schedule nervousness, which triggers unnecessary material movements, delays, reassignments, customers’ dissatisfaction, etc. There are manycontributions about nervousness at the different planning levels, as well as recentadvances seizing that issue at control level. Yet, further specification of the nervousness happening at the shop-floor level (Shop-Floor Schedule Nervousness,SFSN), where a short-term on-going schedule drives the production, is actuallyrequired. In this work, the schedule nervousness notion is introduced briefly froma historical perspective, also, a description in relation to the I4.0 context, and anovel notion of the SFSN, are shortly introduced.