Printed circuit board (PCB) assembly lines are significant to produce a variety of electronic products. PCB manufacturing industries tend move towards automated and complex system due an increase in the customer demand for more sophisticated process involves highly interrelated levels planning scheduling problems. Therefore, current research investigates multi-level lines, which include line assignment models, component allocations machines, placement sequencing by machines on boards. A...

In recent years, environmental concerns have increased the need for design and optimisation of closed-loop supply chain (CLSC) networks. Majority existing research papers consider CLSC network designing line balancing decisions separately. However, this approach may lead to sub-optimal designs due interdependency these decisions. To end, paper investigates a problem integrated with assembly disassembly under demand return uncertainty. The proposed contains manufacturers, remanufacturers,...

Today's dynamic environment and increasing demand for highly customized products have significantly increased the number of companies operating in project environment. Project planning scheduling are one major problems faced by managers due to resource constraints. Enterprises execute several projects simultaneously while sharing limited resources (i.e., human resources, equipment, budget) among effectively meet deadlines. Therefore, this work investigates integrated problem multiple with...

In literature most of the studies on assembly line considered constant task time and minimised cycle time. However, due to several uncertain events in real environment, flow (completion time) tasks varies it can exceed Moreover, these variations are also transferred next station affect stations. To solve this issue, a multi-objective balancing problem, aimed minimise maximise sum average probability stations whole ensure that different will not presence transferred, added or absorbed times...

The design of logistics distribution system for an assembly line with given layout is usually constrained by various factors such as the vehicles components and paths on shop floor vehicle movement. Since optimisation these production systems constraints hard to solve mathematic approaches, simulation-based approach mostly used. In this paper, analysis a logistic performed combined heuristic algorithm obtain solution that most suits practical requirements line. proposed method builds model...

Group scheduling is significant for efficient and cost effective production system. However, there exist setup times between the groups, which require to decrease it by sequencing groups in an way. Current research focused on a sequence dependent group problem with aim minimize makespan addition total weighted tardiness simultaneously. In most of problems, processing time jobs assumed as fixed. actual may be reduced due "learning effect". The integration learning effects has been rarely...

To address the printed circuit board shop scheduling problem, a dynamic based on multi-indicator bottleneck degree is proposed to formulate this complex flexible job problem (FJSP). Then, degree-based migrating birds optimization algorithm (MBO) tackle NP-hard problem. Specifically, assessment model first developed obtain degree, and then two-layer code-decoding structure variable domain addition of improved migratory bird with competitive mechanisms are employed improve effectiveness....

In recent years mixed model production industries are highly interested to apply Industry 4.0 and internet of things. The existing planning scheduling methods not efficient enough make intelligent plans. Therefore, there is a strong need develop which can timely update the medium level lower schedules be utilised for 4.0. Drum buffer rope (DBR) direct application theory constraint, here an plan. Current research proposed DBR-based heuristic algorithm (DBR-HA) multi-level considering shifting...

Operating room planning and scheduling significantly affect all hospital areas, including the intensive care unit downstream wards. Planning operating rooms integrated with units wards can lead to more stable plans schedules that are less prone cancellations. Thus, this study considers room's capacity while making surgery-related decisions. A mixed integer linear programming model for consisting of two stages is proposed. The first stage maximizes scheduled surgical time rooms. In contrast,...

Current research investigates a parallel-tank scheduling problem with hoist and group constraints in printed-circuit-board (PCB) electroplating environment, where the is used as material handling device PCBs need to be grouped for further processing. The purpose of current minimize makespan total weighted tardiness PCB products. ideal point method combine these two objectives into single optimization objective. Moreover, mixed integer programming model developed formulate problem. Since...

In recent years, the competitive pressure on manufacturing companies shifted them from mass production to customization produce large variety of products. It is a great challenge for nowadays customized mixed flow mode meet demand time. Due products, storage system deliver products lines influences timely as investigated by simulation study an inefficient real Company, in current research. Therefore, research proposed slotting optimization model with sequence assemble consideration final...

Flexible machining lines are used in a wide range of industries due to their ability reconfiguration meet high variety customer demands. A novel problem is proposed the current research consider automated flexible line (AFML) with using computer numerical control machines and auxiliary operations robots. mixed-integer programming model for developed. Moreover, method named set-partitioning-based heuristic (SPH) solve this new balancing minimise cycle time performance compared both exact...

The automated flexible transfer line (AFTL) is designed with flexibility, reconfigurability and reliability to satisfy the requirements in real manufacturing environment. It contains multiple stages series performing assigned operations, each stage consists of machining cells one robot identical machines. A multi-objective robust optimisation problem (MOROP) based on AFTL balancing under uncertainty three conflicting objectives, i.e. minimise expected cycle time, probability time exceeding...