scholarly journals Algorithm for workcells design

2021 ◽  
Vol 343 ◽  
pp. 03002
Author(s):  
Livia Dana Beju
Keyword(s):  
Production Rate ◽  
Production Planning ◽  
Process Engineering ◽  
Design Approach ◽  
Design Stage ◽  
Manufacturing Cells ◽  
Manufacturing Cell ◽  
Part Families ◽  
Engineering Control ◽  
Control Procedures

The paper presents a methodology for the design of the manufacturing cells, covering all the necessary steps, from the analysis of the customers’ needs, to part families for group technologies, process engineering, control procedures, production rate, production planning (push or pull workflow), supply in the manufacturing cell, workcell configuration, work standardisation. The necessary tools through each stage are presented. Also, there are presented links to major company systems. For each design stage, deliverables are specified. this design approach is not linear. At each stage it is possible (and indicated) to go back and analyse the previously established parameters. The methodology is a complex one, and in a wider space the detailed parameters will be presented in extenso.

Product and Factory Modeling for Production Rate Determination

1999 ◽  
Author(s):  
S. G. Karthik ◽  
Edward B. Magrab
Keyword(s):  
Production Rate ◽  
Lead Time ◽  
Design Stage ◽  
Manufacturing Processes ◽  
Assembly Structure ◽  
Secondary Manufacturing ◽  
Relationship Of ◽  
The Relationship ◽  
Selection Of ◽  
Made In

Abstract An intelligent graphical user interface that captures a product’s functional and assembly structure and the factory that will make it are described. The results are then used to evaluate a factory’s production rate for the product. The program requires the product to be either a functionally uncoupled or decoupled design. The interface then: (1) implements a visualization of the functionally decomposed product structure; (2) implements an abstraction of a factory; (3) automatically generates candidate primary manufacturing processes and materials that are compatible with each other based on a very small number of attributes; (4) enables the user to make Make/Buy decisions for the components comprising the product; (5) assists the user in the selection of secondary manufacturing processes that are compatible with the primary manufacturing processes and materials for parts made in-house, and specify the vendor and the supply lead time for outsourced parts; (6) enables the specification of alternate materials and manufacturing processes; (7) implements a visual representation of the assembly structure as specified by the user; and (8) partially automates the creation of the assembly structure, and assists in the selection of assembly methods that are compatible with the materials chosen. In addition, the program assists in the design for assembly by: (1) requiring the product development team to think about the assembly process early in the design stage; (2) providing a visualization of the relationship of all components comprising the product to its other components; (3) requiring the specification of the order in which they are to be assembled; and (4) requiring the selection of assembly processes that are compatible with each other and the materials chosen. It also requires the specification of the capabilities of the factory that is going to make one or more of the components of the product, and requires that Make/Buy decisions for the parts comprising the product be made.

A design approach towards sustainable buildings in Algeria

2019 ◽  
Vol 9 (3) ◽  
pp. 229-245
Author(s):  
Sofiane Rahmouni ◽  
Rachid Smail
Keyword(s):  
Energy Consumption ◽  
Simulation Software ◽  
Cold Climate ◽  
Design Approach ◽  
Office Building ◽  
Design Stage ◽  
Building Performance ◽  
Sustainable Buildings ◽  
Content Type ◽  
Efficiency Measures

Purpose The purpose of this paper is to achieve the national strategic agenda’s criteria that aim for accomplishing sustainable buildings by estimating the effects of energy efficiency measures in order to reduce energy consumption and CO2 emission. Design/methodology/approach A design approach has been developed based on simulation software and a modeled building. Therefore, a typical office building is considered for testing five efficiency measures in three climatic conditions in Algeria. This approach is conducted in two phases: first, the analysis of each measure’s effect is independently carried out in terms of cooling energy and heating energy intensities. Then, a combination of optimal measures for each climate zone is measured in terms of three sustainable indicators: final energy consumption, energy cost saving and CO2 emission. Findings The results reveal that a combination of optimal measures has a substantial impact on building energy saving and CO2 emission. This saving can rise to 41 and 31 percent in a hot and cold climate, respectively. Furthermore, it is concluded that obtaining higher building performance, different design alternatives should be adapted to the climate proprieties and the local construction materials must be applied. Originality/value This study is considered as an opportunity for achieving the national strategy, as it may contribute in improving office building performance and demonstrating a suitable tool to assist stakeholders in the decision making of most important parameters in the design stage for new or retrofit buildings.

Basic Process Engineering Control

2014 ◽  
Author(s):  
Paul Serban Agachi ◽  
Mircea Vasile Cristea
Keyword(s):  
Process Engineering ◽  
Basic Process ◽  
Engineering Control

Manufacturing cell scheduling using genetic algorithms

2000 ◽  
Vol 214 (2) ◽  
pp. 159-163 ◽  
Author(s):  
G C Onwubolu
Keyword(s):  
Genetic Algorithm ◽  
Flow Shop ◽  
Performance Measure ◽  
Scheduling Problems ◽  
Mean Flow ◽  
Manufacturing Cells ◽  
Data Set ◽  
Manufacturing Cell ◽  
Combinatorial Optimization Problems ◽  
Genetic Algorithm Procedure

This paper presents a new approach to the scheduling of manufacturing cells which have flow-shop configuration. The approach is based on the genetic algorithm, which is a meta-heuristic for solving combinatorial optimization problems. The performance measure demonstrated in this paper is the optimization of the mean flow time. The procedure developed automatically computes the make-span. A flexible manufacturing cell schedule is used as a case study. The genetic algorithm procedure was used to solve a published data set for simple scheduling problems. The genetic algorithm procedure was further used to solve large flow-shop scheduling problems having machine sizes of up to 30 and job sizes of up to 100 in very reasonable computation time. The results show that the genetic-algorithm-based heuristic is promising for scheduling manufacturing cells.

Applying lean production principles to facilities design of ramp-up factories

Facilities ◽  
2015 ◽  
Vol 33 (5/6) ◽  
pp. 280-301 ◽  
Author(s):  
Sui Pheng Low ◽  
Shang Gao ◽  
Kai Lin Tiong
Keyword(s):  
Lean Production ◽  
Design Model ◽  
Design Approach ◽  
Design Stage ◽  
Design Features ◽  
Content Type ◽  
Design Philosophy ◽  
Traditional Design ◽  
Facilities Design ◽  
Car Park

Purpose – This study aims to examine how lean production principles (LPP) can be incorporated in the context of ramp-up factories to improve future ramp-up factory designs. The application of LPP to the facilities design of ramp-up factories can help to reduce waste and achieve higher-quality products. However, the traditional design philosophy of “design follows function” has not considered the application of LPP during the early design development stage to more effectively meet tenants’ operational needs at the occupation stage. Design/methodology/approach – Based on a review of past literature, a set of LPP-driven facilities design features is presented, which seek to integrate traditional design principles and LPP. A survey was subsequently carried out with tenants operating in ramp-up factories to determine the relevance of the proposed LPP-driven facilities design features from their perspectives. Findings – It is found that generally most of the proposed LPP-driven facilities design features can help to improve tenants’ operational needs after the building is occupied. The study found that the significant LPP-driven facilities design features for ramp-up factories include: large span, clear floor-to-ceiling height, rectangular bay, wide frontage area, mezzanine floor system, evenly distributed lighting, white or light colour surfaces, private parking spaces, private loading/unloading bay, clearly defined car park entrance, wide vehicular ramp, wide driveway, sheltered loading/unloading bay and multi-storey car park embedded in the complex. The reasons for their significance are explained in the study. Practical implications – The LPP design model for ramp-up factories provides a useful checklist of important tenants’ requirements for the designers of ramp-up factories. This research also suggests that it is desirable to apply LPP in the design stage to improve the facilities design of ramp-up factories that is beneficial to tenants at the occupation stage. Originality/value – This research formulated a design model integrated with LPP for ramp-up factories. It extends the traditional design approach of “design follows function” to encompass LPP to transform the approach to a new LPP-driven facilities design philosophy. This new approach serves to better meet tenants’ requirements at the occupation stage. It is recommended that architecture schools incorporate the LPP-driven facilities design approach as one of their educational outcomes.

scholarly journals Life Cycle Performance Assessment Tool Development and Application with a Focus on Maintenance Aspects

2019 ◽  
Vol 7 (8) ◽  
pp. 280 ◽  
Author(s):  
Paola Gualeni ◽  
Giordano Flore ◽  
Matteo Maggioncalda ◽  
Giorgia Marsano
Keyword(s):  
Life Cycle ◽  
Performance Assessment ◽  
Integrated Design ◽  
Selection Criterion ◽  
Design Approach ◽  
Cycle Performance ◽  
Design Stage ◽  
Design Solution ◽  
Technical Solution ◽  
Design Solutions

Ships are among the most complex systems in the world. The always increasing interest in environmental aspects, the evolution of technologies and the introduction of new rule constraints in the maritime field have compelled the innovation of the ship design approach. At an early design stage, there is the need to compare different design solutions, also in terms of environmental performance, building and operative costs over the whole ship life cycle. In this context, the Life Cycle Performance Assessment (LCPA) tool allows an integrated design approach merging the evaluation of both costs and environmental performances on a comparative basis, among different design solutions. Starting from the first tool release, this work aims to focus on the maintenance of the propulsion system, developing a flexible calculation method for maintenance costs prediction, based on the ship operational profiles and the selected technical solution. After the improvement, the whole LCPA tool has been applied on a research vessel to evaluate, among different propulsion layout solutions, the one with the more advantageous performance in terms of costs during the whole vessel operating life. The identification of the best design solution is strictly dependent on the selection criterion and the point of view of the interested parties using the LCPA tool, e.g., the shipbuilder or the ship-owner.

Design for Fixturability (DFF) Methodology for Commodity Parts: A Case Study With Connecting Rod Designs

2002 ◽  
Vol 2 (1) ◽  
pp. 21-27 ◽  
Author(s):  
Khurshid A. Qureshi ◽  
Kazuhiro Saitou
Keyword(s):  
Mass Production ◽  
Parametric Representation ◽  
Design Stage ◽  
Design Parameters ◽  
Concept Design ◽  
Connecting Rod ◽  
Automotive Engine ◽  
Part Families ◽  
Manufacturing Facilities

This paper presents a methodology called ‘Design for Fixturability’ (DFF). This methodology enables designers to perform manufacturability analysis of their product designs upfront into the design process. The DFF approach provides a mapping between parametric representation of a part design and fixturing capability of a facility and presents a methodology to evaluate the design with respect to the fixturing capabilities. The methodology is applicable to the mass-production commodity parts and part families, which typically require dedicated manufacturing facilities. A prototype DFF system for connecting rods of an automotive engine is developed. The system enables the designers to design the connecting rods by considering the fixturing (datums) capabilities of existing manufacturing facilities during the concept design stage, when design parameters are still not frozen. The DFF system analyzes the design with respect to fixturing capabilities of facilities and generates suggestions for the designer, to modify his design if required.

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