Designing a manufacturing System through Lean Layouts and Cellular Manufacturing

1. Designing a manufacturing System through Lean Layouts and Cellular Manufacturing Traditionally, many conventional factory design had common manufacturing method of Job shop which is organised based on the concept where all similar operations are grouped and put in one room with a supervisor or a manager. High batch size, high volume transportation, high need for storage space and aisles/pathways flooded with materials resulting safety compromise. Factory design in the form of Lean layout with cellular manufacturing concepts helps in improving productivity, reduction of Lead time, improves Quality and improves ontime performance. As per new manufacturing system design, cellular manufacturing concepts can have several types The following are some of the key objectives of Lean layout: •Smooth flow of work •Machines in sequence with operations •Minimum Operator Inconvenience •Easy Material Handling •Elimination of unnecessary material movement •Space for storage of materials •Space for storage of tools close to the machine •Space for operator movement •Space for easy maintenance •Space for holding maintenance equipment

2. •Parking space for manual trolleys, fork-lifts, •Trucks, Power Trolleys etc •Clear aisles for safe movement of trolleys. •Space for operators tool-kit, gauges, measuring instruments •Proper location of inspection facility The following are the steps involved in creating Lean Layout from a running factory. Current Layout 1.Draw current layout to the scale to create template for the entire plant. This includes machines, storage places, gangways etc. 2.Draw flow diagram on the layout to understand the material movement. 3.List down the constraint in the existing layout like movement, storage space, critical machines etc. New Layout 1.Analyse possibility of creating cellular manufacturing concept. Design of new layout depends on cellular manufacturing / non cellular manufacturing. 2.Create block layout in the new available space allowing space for expansion. Create at least two alternatives, discuss with management and select best one. 3.Draw detailed layout showing gangways, WIP storage and all equipments. Remove constraints from the existing layout. Show material movement from RM store to FG to understand the flow. Factors influencing plant layout: Material : Variety, Quantity, Operations, Sequence of operations Machinery : Equipment, Tools Man Movement : Operators, Supervisors, Inspectors, Services Staff Material handling methods, Clear space for movement & safety of personnel. Storage : Storage of In-Process & POU material Services : Power Lines, Air Lines, Water Lines, Exhaust Lines, Inspections, Maintenance, Process Scrap, Tools Storage, Other Special Requirements. Layout Evaluation Checklist •Effectiveness of material flow 1.Shortest path for greater velocity 2.Internal & external access 3.WIP, throughput time •Layout flexibility 1.Ease of arrangement 2.Ease of adding replacing equipment

3. Fit with overall layout •Material Handling effectiveness 1.Ease of arrangement 2.Ease of adding replacing equipment 3.Ease of material movement, distance travelled •Space utilization 1.Density 2.Configuration •Support service integration 1.Tools & fixtures 2.Ease of maintenance 3.Information 4.Utilities 5.Human Resources 6.Scheduling 7.Quality 8.Suppliers •Supervision & Control 1.Line of sight management 2.Cell to cell communication 3.Environmental factors •Working conditions 1.Workstation access, 2.Ease of operator movement 3.Access to amenities 4.Environmental concerns 5.Distance of operator movement •Ease of implementation 1.Production interruption 2.Sequence of timing 3.Building alterations 4.Utilities

4. 5.Access to riggers 6.Multi operation (part or full nagare cell) •Cost of implementation 1.building alterations 2.Temporary moves 3.Required overtime 4.New equipment costs Weight age Sl No Criteria (scale 1~10) – Based on the requirement of the project Plan 1 Plan 2 1 Ease of operator 6 2 Space (sq mtrs) 4 3 Ease of material movement 8 4 Length of travel 7 5 Flexibility 7 6 Ease of supervision 6 7 WIP 8 8 Throughput time 9 9 Multi operation 7 10 Ease of maintenance 7 11 Product flow 5 Seven Steps Business Transformation is in the field of supporting organisations in their Journey of Excellence. For manufacturing facilities, we support in designing lean layout in line with principles of value, continuous flow, pull system and help in mixed model – low volume and high mix production.

5. Seven Steps Business Transformation Systems is India based organisation helping organisations in their Journey of Excellence. We have consultants with wide experience in industry segments such as manufacturing, services, retail, logistics, food, construction, Information Technology, Education, Health care services. Our consultants are experts in deployment of Total Productive Maintenance, Lean manufacturing, lean services, Lean hospitals, Lean Health care, Lean Construction, Lean office. We work with multiple industry sectors such as Automotives, Equipment manufacturing, defence products, pharmaceuticals, Aerospace components, high precision manufacturing, apparel to name a few. •Personal Development Programs •Basics of Business Excellence •Value Added Quality Management Systems •Total Productive Maintenance (TPM) •Lean Thinking & Lean Management •Leadership Training Programs