Production Control Model Using Lean Manufacturing Tools and Kanban/CONWIP Systems to Improve Productivity in the Process of Sand Casting in a Heavy Metalworking SME

The lean manufacturing concept is a systematic minimization of waste and non-value activities in production processes introduced by the Toyota production system. In this research, lean manufacturing is implemented in a cement production line. Value Stream Mapping (VSM) is applied to give a clear picture of the value chain in cement production processes and to highlight the non-value-added in the shop floor. To begin, the existing VSM is constructed based on the information and data gathered during visiting and observing the manufacturing process in the firm. As a result, the excess inventory between workstations was identified as a major waste generation, hence, the proposed VSM conducts further improvement and makes action plans to alleviate the unwanted activities. Then, the takt time to ensure smooth material flow and to avoid any occurring delay or bottleneck in the production line was figured out. The supermarket pull-based production control is suggested to be adopted in the future map. Two pull production strategies are selected in this case. The first is applying the Kanban system to control the level of inventory between workstations. The other is the CONWIP approach to control the amount of work in process to the entire production line. The outcome of the proposed models indicates a decrease of the none-value time from 23 days in the current state to about 4 and 2 days in Kanban and CONWIP systems respectively, so the CONWIP was suggested as most efficient. Some suggestions for further research are also mentioned.

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Conceptual Design of an Integrated Autonomous Production Control Model in association with a Prescriptive Maintenance Model (PriMa)

Procedia CIRP ◽

10.1016/j.procir.2019.01.047 ◽

2019 ◽

Vol 80 ◽

pp. 482-487

Author(s):

Robert Glawar ◽

Fazel Ansari ◽

Csaba Kardos ◽

Kurt Matyas ◽

Wilfried Sihn

Keyword(s):

Conceptual Design ◽

Production Control ◽

Control Model ◽

Maintenance Model

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Cyber-physical systems matrix control model

Journal of Physics Conference Series ◽

10.1088/1742-6596/2094/4/042067 ◽

2021 ◽

Vol 2094 (4) ◽

pp. 042067

Author(s):

A V Gurjanov ◽

D A Zakoldaev ◽

I O Zharinov ◽

O O Zharinov

Keyword(s):

Production Control ◽

Cyber Physical Systems ◽

Control Model ◽

Information Component ◽

Control Task ◽

Physical Systems ◽

Technical Architecture ◽

Production Complex ◽

Matrix Control ◽

Working Out

Abstract The Industry 4.0 technologies oriented for the modern industry as an application to solve the cyber-physical production control general task are viewed. A task to control is positioned as a hierarchy, which require some special schemes cyber-physical systems interaction organization to be developed. The control task hierarchy is converted to the control means hierarchy, within which they preserve the cyber-physical systems groups coordination unity organized in the company functional divisions in structure principle with variable equipment consistency. Information and functional cyber-physical systems interconnection are proposed to be defined within the technical architecture providing cyber-physical production complex automatizing. In the control system they underline the information component realizing not only calculation functions measuring but also net communication. Controlling and being controlled cyber-physical systems are proposed to be united into structures actively interacting with functional company divisions into closed automatic loops working out information and signal actions. There is a cyber-physical production hierarchy structure example given based on control processes tides formalized in physical and virtual levels. There is a cyber-physical systems matrix control model given to coordinate calculations, communications and industrial automatics functionality.

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Design of Hydraulic System of Subsea X-Tree

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.155-156.540 ◽

2012 ◽

Vol 155-156 ◽

pp. 540-544

Author(s):

Hong Lin Zhao ◽

Jia Yu ◽

Yuan Long Yue ◽

Song Li ◽

Bu Quan Guo

Keyword(s):

Control System ◽

Hydraulic System ◽

Production Control ◽

Control Valve ◽

Control Model ◽

Hydraulic Control ◽

Hydraulic Systems ◽

Hydraulic Power ◽

Production Control System

Onshore hydraulic systems are not generally applied in subsea production control system,so how to design a special needed hydraulic system for subsea X-tree has been one of the hot research questions.Several specific hydraulic components were analyzed, such as hydraulic power unite,umbilical,subsea control model,hydraulic control valve and valve actuator, and then corresponding hydraulic schematic which can meet the requirements of subsea X-tree is presented.

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Optimal Production Planning for a Random Horizon

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.791.63 ◽

2015 ◽

Vol 791 ◽

pp. 63-69

Author(s):

Arkadiusz Gola ◽

Edward Kozłowski

Keyword(s):

Mathematical Model ◽

Production Control ◽

Planning Horizon ◽

Control Model ◽

Planning Period ◽

Manufacturing Costs ◽

Optimal Production ◽

Random Horizon ◽

The Mathematical Model ◽

Random Planning Horizon

The article presents the mathematical model of production control for a random planning horizon. The model assumes that the horizon of control is unknown and connected with reliability of machines, which are used for production. The aim of the control model is to determine the number of products which should be manufactured in each planning period to minimize both manufacturing costs and potential financial penalties for failing to fulfill the order completely.

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