Facilities Location, Layout and Planning

FACILITY PLANNING The placement of facility – customers, suppliers, other links in the supply chain Resources Strategy – 99cents Only example Access to customers Government impacts

Objectives of Facility Layout Minimize material handling costs Minimize material handling costs Utilize space efficiently Utilize space efficiently Utilize labor efficiently Utilize labor efficiently Eliminate bottlenecks Eliminate bottlenecks Facilitate communication and interaction between workers, between workers and their supervisors, or between workers and customers Facilitate communication and interaction between workers, between workers and their supervisors, or between workers and customers Reduce manufacturing cycle time or customer service time Reduce manufacturing cycle time or customer service time

Objectives of Facility Layout Eliminate waste or redundant movement Eliminate waste or redundant movement Facilitate the entry, exit, and placement of material, products, or people Facilitate the entry, exit, and placement of material, products, or people Incorporate safety and security measures Incorporate safety and security measures Promote product and service quality Promote product and service quality Encourage proper maintenance activities Encourage proper maintenance activities Provide a visual control of operations or activities Provide a visual control of operations or activities Provide flexibility to adapt to changing conditions Provide flexibility to adapt to changing conditions Increase capacity Increase capacity

Questions on Layout Planning How should the facility be laid out? Does my layout cause unnecessary movement/excess travel time? Does my work flow in a logical manner? Does size dictate layout or does layout/product flow dictate the size?

Process Layout Process Layout Machines grouped by process they perform Machines grouped by process they perform Product Layout Product Layout Linear arrangement of workstations to produce a specific product Linear arrangement of workstations to produce a specific product Fixed Position Layout Fixed Position Layout Used in projects where the product cannot be moved Used in projects where the product cannot be moved Basic Types of Layouts

Manufacturing Process Layout L L L L L L L L L L M M M M D D D D D D D D G G G G G G A AA Receiving and Shipping Assembly Painting Department Lathe Department Milling Department Drilling Department Grinding Department P P

Manufacturing Process Layout L L L L L L L L L L M M M M D D D D D D D D G G G G G G A AA Receiving and Shipping Assembly Painting Department Lathe Department Milling Department Drilling Department Grinding Department P P

Manufacturing Process Layout L L L L L L L L L L M M M M D D D D D D D D G G G G G G A AA Receiving and Shipping Assembly Painting Department Lathe Department Milling Department Drilling Department Grinding Department P P

A Product Layout In Out

Fixed-Position Layouts Typical of projects Equipment, workers, materials, other resources brought to the site Highly skilled labor Often low fixed Typically high variable costs

Designing Process Layouts Minimize material handling costs Block Diagramming Minimize nonadjacent loads Use when quantitative data is available Relationship Diagramming Based on location preference between areas Use when quantitative data is not available

Block Diagramming Create load summary chart Create load summary chart Calculate composite (two way) movements Calculate composite (two way) movements Develop trial layouts minimizing number of nonadjacent loads Develop trial layouts minimizing number of nonadjacent loads Example Example

Relationship Diagramming (Murther’s Grid) Used when quantitative data is not available Muther’s grid displays preferences Denote location preferences with weighted lines

Relationship Diagramming Example Production Offices Stockroom Shipping and receiving Locker room Toolroom

Relationship Diagramming Example A A A O O O O O U U U U E X I Production Offices Stockroom Shipping and receiving Locker room Toolroom AAbsolutely necessary EEspecially important IImportant OOkay UUnimportant XUndesirable

Relationship Diagramming Example Production Offices Stockroom Shipping and receiving Locker room Toolroom 1Absolutely necessary 2Especially important 3Important 4Okay 5Unimportant 6Undesirable

Facility Location Models

Types Of Facilities Heavy manufacturing Auto plants, steel mills, chemical plants Light industry Small components mfg, assembly Warehouse & distribution centers Retail & service

Factors in Heavy Manufacturing Location Construction costs Land costs Raw material and finished goods shipment modes Proximity to raw materials Utilities Labor availability

Factors in Light Industry Location Construction costs Construction costs Land costs Land costs Easily accessible geographic region Easily accessible geographic region Education & training capabilities Education & training capabilities

Factors in Warehouse Location Transportation costs Proximity to markets (Customers)

Service Location Considerations Labor Cost of Living Real Estate Construction Government Incentives Examples – Amoco, Mass St, Tattoo Parlors, Walgreen’s

Global Location Factors Government stability Government regulations Political and economic systems Economic stability and growth Exchange rates Culture Climate Export import regulations, duties and tariffs Raw material availability Number and proximity of suppliers Transportation and distribution system Labor cost and education Available technology Commercial travel Technical expertise Cross-border trade regulations Group trade agreements

Regional Location Factors Community government Local business regulations Government services Business climate Community services Taxes Availability of sites Financial Services Community inducements Proximity of suppliers Education system

Site Location Factors Customer base Construction/ leasing cost Land cost Site size Transportation Utilities Zoning restrictions Traffic Safety/security Competition Area business climate Income level

Location Incentives Tax credits Wal-Mart in Wyandotte Relaxed government regulation Job training Infrastructure improvement Money

Locate facility at center of geographic area Based on weight and distance traveled Establish grid-map of area Identify coordinates and weights shipped for each location Center-of-Gravity Technique

Facility Summary Why is it important? Location analysis Location Criteria – global, local, regional - education Location and Strategy Location and Customers Layout planning

Project Management and Operations

Project Management First Essay on Project Management: 1697 – “An Essay Upon Projects” 1959 HBR Article – “The Project Manager” Air Force Manual 1964

Project Management In today’s global marketplace, complexity and speed are certainties. In such an environment, a good axiom for project management is, Do It, Do It Right, Do It Right Now. Creating clear direction, efficiency, timely response, and quality outcomes requires project managers who are agile -- adept at change. The associated disciplinary areas are clearly spelled out in the following PMI definition. “Project management is the application of knowledge, skills, tools, and techniques to a broad range of activities in order to meet the requirements of a particular project. Project management is comprised of five Project Management Process Groups – Initiating Processes, Planning Processes, Executing Processes, Monitoring and Controlling Processes, and Closing Processes. Source: Project Management Institute -

Elements of Project Management Project team Project team Individuals from different departments within company Individuals from different departments within company Matrix organization Matrix organization Team structure with members from different functional areas depending on skills needed Team structure with members from different functional areas depending on skills needed Project manager - Leader of project team Project manager - Leader of project team Project Charter – high level description of what is to be accomplished in a project and delegates authority to project manager to implement actions to complete project Project Charter – high level description of what is to be accomplished in a project and delegates authority to project manager to implement actions to complete project

Project Planning Statement of work Statement of work Written description of goals, work & time frame of project Written description of goals, work & time frame of project Activities require labor, resources & time Activities require labor, resources & time Precedence relationship shows sequential relationship of project activities Precedence relationship shows sequential relationship of project activities

Elements of Project Planning Define project objective(s) Define project objective(s) Identify activities Identify activities Establish precedence relationships Establish precedence relationships Make time estimates Make time estimates Determine project completion time Determine project completion time Compare project schedule objectives Compare project schedule objectives Determine resource requirements to meet objective Determine resource requirements to meet objective

Work Breakdown Structure Hierarchical organization of work to be done on a project Hierarchical organization of work to be done on a project Project broken down into modules Project broken down into modules Modules subdivided into subcomponents, activities, and tasks Modules subdivided into subcomponents, activities, and tasks Identifies individual tasks, workloads, and resource requirements Identifies individual tasks, workloads, and resource requirements

Project Control All activities identified and included All activities identified and included Completed in proper sequence Completed in proper sequence Resource needs identified Resource needs identified Schedule adjusted Schedule adjusted Maintain schedule and budget Maintain schedule and budget Complete on time Complete on time

A Gantt Chart Popular tool for project scheduling Popular tool for project scheduling Graph with bar for representing the time for each task Graph with bar for representing the time for each task Provides visual display of project schedule Provides visual display of project schedule Also shows slack for activities Also shows slack for activities Amount of time activity can be delayed without delaying project Amount of time activity can be delayed without delaying project Around since 1914

Gantt Charts Gantt charts were employed on major infrastructure projects including the Hoover Dam and Interstate highway system and still are an important tool in project management. Gantt described two principles for his charts: 1.measure activities by the amount of time needed to complete them 2.the space on the chart can be used the represent the amount of the activity that should have been done in that time.

A Gantt Chart |||||||||| Activity Design house and obtain financing Lay foundation Order and receive materials Build house Select paint Select carpet Finish work MonthMonth Figure 6.2

Example of Gantt Chart Problem

CPM/PERT Critical Path Method (CPM) Critical Path Method (CPM) DuPont & Remington-Rand (1956) DuPont & Remington-Rand (1956) Deterministic task times Deterministic task times Project Eval. & Review Technique (PERT) Project Eval. & Review Technique (PERT) US Navy, Lockheed US Navy, Lockheed Multiple task time estimates Multiple task time estimates

PERT/CPM Program Evaluation and Review Technique (PERT): developed in conjunction with the development of the Polaris missile program for submarines – developed by the US Navy with Lockheed as the lead contractor Critical Path Method (CPM): developed through a joint venture between the DuPont Corporation and the Remington Rand Corporation – the original purpose was to monitor and evaluate plant maintenance management projects.

Project Network for a House Lay foundation Design house and obtain financing Order and receive materials Dummy Finish work Select carpet Select paint Build house Figure 6.4

Critical Path A path is a sequence of connected activities running from start to end node in network A path is a sequence of connected activities running from start to end node in network The critical path is the path with the longest duration in the network The critical path is the path with the longest duration in the network Project cannot be completed in less than the time of the critical path Project cannot be completed in less than the time of the critical path

The Critical Path A: = 9 months B: = 8 months C: = 8 months D: = 7 months Lay foundation Design house and obtain financing Order and receive materials Dummy Finish work Select carpet Select paint Build house

The Critical Path Lay foundation Design house and obtain financing Order and receive materials Dummy Finish work Select carpet Select paint Build house Start at 3 months Start at 5 months 1 Finish at 9 months Start at 8 months Figure 6.6 Activity Start Times

Project Crashing Crashing is reducing project time by expending additional resources Crashing is reducing project time by expending additional resources Crash time is an amount of time an activity is reduced Crash time is an amount of time an activity is reduced Crash cost is the cost of reducing the activity time Crash cost is the cost of reducing the activity time Goal is to reduce project duration at minimum cost Goal is to reduce project duration at minimum cost

Crashing costs increase as project duration decreases Crashing costs increase as project duration decreases Indirect costs increase as project duration increases Indirect costs increase as project duration increases Reduce project length as long as crashing costs are less than indirect costs Reduce project length as long as crashing costs are less than indirect costs Time-Cost Relationship

Life Cycle Management Long term view of projects to guide decision making – solutions that provide life time success vice short term Acquisition; development; production; introduction; sustainment; disposal Links system costs to big picture; better use of resources; minimize total cost of ownership

Capacity and Aggregate Planning

Capacity Outputs: Examples

The goal of capacity planning decisions (1)The capacity of the firm to produce the service or good (2)The processes for providing the service or making the good (3)The layout or arrangement of the work space (4)The design of work processes to enhance productivity

Capacity The max output that an organization be capable of producing Measure a single facility: –Design vs. Effective capacity –Capacity Utilization: design vs. efficient utilization For systems have more than one facility and flows of product –System capacity and bottleneck –Improve system capacity

Determinants of Effective Capacity Facilities Human considerations –Adding people –Increasing employee motivation Operations –Improving operating rate of a machine –Improving quality of raw materials and components External forces –Safety regulations

Capacity Utilization Measures how much of the available capacity is actually being used: –Always <=1(percentage of usage) –Higher the better –Denominator: If effective capacity used: efficient utilization If design capacity used: design utilization

Aggregate Planning The process of planning the quantity and timing of output over the intermediate range (3-18 months) by adjusting production rate, employment, inventory Master Production Schedule: formalizes the production plan and translates it into specific end item requirements over the short to intermediate horizon

Capacity Planning The process of determining the amount of capacity required to produce in the future. May be at the aggregate or product line level Master Production Schedule - anticipated build schedule Time horizon must exceed lead times for materials

Capacity Planning Look at lead times, queue times, set up times, run times, wait times, move times Resource availability Material and capacity - should be in synch driven by dispatch list - listing of manufacturing orders in priority sequence - ties to layout planning load profiles - capacity of each section

the capacity decisions: When to add capacity How much capacity to add Where to add capacity What type of capacity to add When to reduce capacity

Capacity Planning Rough Cut Capacity Planning - process of converting the master production schedule into requirements for key resources capacity requirements plan - time- phased display of present and future capacity required on all resources based on planned and released orders

Capacity Planning Capacity Requirements Planning (CRP) - process of determining in detail the amount of labor and machine resources required to meet production plan RCCP may indicate sufficient capacity but the CRP may indicate insufficient capacity during specific time periods

Theory of Constraints Every system has a bottle neck capacity of the system is constrained by the capacity of the bottle neck increasing capacity at other than bottle neck operations does not increase the overall capacity of the system

Theory of Constraints What needs to be changed What to change to How to make the change happen

Theory of Constraints Identify the constraint Subordinate Inertia Walk the process again inertia of change can create new bottle necks

Capacity Planning Establishes overall level of productive resources Establishes overall level of productive resources Affects lead time responsiveness, cost & competitiveness Affects lead time responsiveness, cost & competitiveness Determines when and how much to increase capacity Determines when and how much to increase capacity

Capacity Expansion Volume & certainty of anticipated demand Volume & certainty of anticipated demand Strategic objectives for growth Strategic objectives for growth Costs of expansion & operation Costs of expansion & operation Incremental or one-step expansion Incremental or one-step expansion

Sales and Operations Planning (S&OP) Brings together all plans for business performed at least once a month Internal and external

Adjusting Capacity to Meet Demand 1.Producing at a constant rate and using inventory to absorb fluctuations in demand (level production) 2.Hiring and firing workers to match demand (chase demand) 3.Maintaining resources for high demand levels 4.Increase or decrease working hours (overtime and undertime) 5.Subcontracting work to other firms 6.Using part-time workers 7.Providing the service or product at a later time period (backordering)

Demand Management Shift demand into other periods Shift demand into other periods Incentives, sales promotions, advertising campaigns Incentives, sales promotions, advertising campaigns Offer product or services with countercyclical demand patterns Offer product or services with countercyclical demand patterns Partnering with suppliers to reduce information distortion along the supply chain Partnering with suppliers to reduce information distortion along the supply chain

Remedies for Underloads 1.Acquire more work 2.Pull work ahead that is scheduled for later time periods 3.Reduce normal capacity

Remedies for Overloads 1.Eliminate unnecessary requirements 2.Reroute jobs to alternative machines or work centers 3.Split lots between two or more machines 4.Increase normal capacity 5.Subcontract 6.Increase the efficiency of the operation 7.Push work back to later time periods 8.Revise master schedule

Scheduling as part of the Planning Process

Scheduling is the last step in the planning process? It is one of the most challenging areas of operations management. Scheduling presents many day-to-day problems for operations managers because of –Changes in customer orders –Equipment breakdowns –Late deliveries from suppliers –A myriad of other disruptions Scheduling

Objectives in Scheduling  Meet customer due dates  Minimize job lateness  Minimize response time  Minimize completion time  Minimize time in the system  Minimize overtime  Maximize machine or labor utilization  Minimize idle time  Minimize work-in-process inventory  Efficiency

Sequencing Rules  FCFS - first-come, first-served  LCFS - last come, first served  DDATE - earliest due date  CUSTPR - highest customer priority  SETUP - similar required setups  SLACK - smallest slack  CR - critical ratio  SPT - shortest processing time  LPT - longest processing time

Critical Ratio Rule CR considers both time and work remaining If CR > 1, job ahead of schedule If CR < 1, job behind schedule If CR = 1, job on schedule time remainingdue date - today’s date work remaining remaining processing time Ties scheduling to Gantt Chart or PERT/CPM