The goal is to achieve the desired output rate with the smallest number of workstations. A case study of lineofbalance based schedule planning and control system olli seppanen1, erno aalto2 abstract lineofbalance is a graphical technique which can be used to plan and manage work flow. Cpu scheduling the scheduler selects from among the processes in memory that are ready to execute, and allocates the cpu to one of them cpu scheduling decisions may take place when a process. Line of balance lob is a management control process for collecting, measuring and presenting facts relating to time, cost and accomplishment all measured against a specific plan. Resourcedriven scheduling, on the other hand, is different and is more focused on resources. The line of balance lob technique is a tool that presents actual progress versus planned progress of projects that manufacture or construct repetitive projects. Lob collects, measures and presents information relating to time, cost. The line of balance scheduling technique is appropriate for repetitive work. Linear scheduling methods are planning and scheduling techniques mostly used in construction and manufacturing industries where repetitive operations are. The line of balance scheduling method lbsm is also a technique absent from the pmbok guide since its first release 1996, 2000, 2004, 2008 and 20. This construction scheduling technique assigns required resources for steps of operation, so the subsequent works are not delayed and the fruitful results can be achieved. Apr 25, 2017 according to esigning buildings wiki 2017, line of balance lob is a management control process used in construction where the project contains blocks of repetitive work activities, such as roads, pipelines, tunnels, railways and highrise buildings. This strategy involves setting a planned rate of production for necessary materials to be fabricated within a particular time frame. In order to balance a production line in sewing floor a line was chosen and necessary data was accumulated from the line.
The main objective is to find the required resources for. An example of line balancing simulation expert brian harrington discusses how simulation can play a key part in the successful completion of a manufacturing project when the conflicting objectives of cost, quality and time all need to be delivered on. Line of balance is a graphical technique which can be used to plan and manage work flow. This is a list of tasks per team member, documented in a spreadsheet or word processor. Line of balance lob1 is a method of showing the repetitive work that may. Line of balance scheduling project scheduling and management. Unlike a bar chart, which shows the duration of a particular activity, a lob chart shows the rate at which the work that makes up all of the activities has to be undertaken to stay on schedule 2, the. Evidence on the use of line of balance as a scheduling technique already exists in the. Arranging stations in a sequence line for the product to move from one station to the next until its completion at. Application of line of balance scheduling technique international. Also covered is the line of balance scheduling method which is a. This method is simple and familiar to most people, and is especially useful for smaller projects. R sreemahadevan pillai a comprehensive study of project scheduling techniques and the introduction of new techniques thesis. The construction industry currently utilizes the critical path method scheduling technique cpm to plan and manage most construction projects.
It is utilized in determining production progress in terms of percent of task completion. This paper describes a lineofbalance based schedule planning and control system, and its connection with lean construction methods, using a commercial software package called. Critical path method cpm tutor for construction scheduling. It is suitable for construction projects because of their large degree of repetition. The lineofbalance also known as the vertical production method is a graphical technique that can be used in conjunction with arrow or precedence diagrams.
The target output rate for this project, which is r, is three sections per week. Assembly systems and line balancing discrete products are assembled from components. Line of balance lob lob is a planning methodology to optimize resources used lob is a good visual tool that lets us see if a construction program can be achieved with the minimum waiting time between tasks it is primarily used on projects that have repeated elements like highways, pipelines, highrise buildings. As the requirement of a project the method like critical path method cpm, linear scheduling method lsm, and line of balance lob are applied on it. The first step is to divide the work into activities and crews that can move as units along the sequence of. The line of balance technique has been applied in construction work mainly to house building and to a lesser extent to jetty work and in conjunction with networks to road works. It shows the process, status, background, timing and phasing of the project activities, thus providing management with measuring tools. Department of civil engineering, regional engineering college calicut, university of calicut, 2002. The lob technique was developed in the early 40s into the manufacturing environment and adapted by researchers for using on construction industry in the 70s. Line of balance lob 1 is a method of showing the repetitive work that may exist in a project as a single line on a graph.
Oct 09, 2015 another example of line balancing based on longest task time rule. May 20, 2018 first course on how to create dynamic 3d gantt charts using simple excel charts at 95% off. Modified lineofbalance has been the dominant scheduling method in. Line balancing production and operations management in production, line balancing is useful tool. The line of balance scheduling technique lobst is a linear scheduling method that allows the balancing of the operations such that each activity is continuously and. The use of the line of balance scheduling method has been increasing, especially on the construction industry companies of brazil, finland and australia.
Line of balance lob is a management control process for collecting, measuring and presenting facts relating to time see schedule control, cost and accomplishment all measured against a specific plan. Another example of line balancing based on longest task time rule. Line balancing production and operations management. Linear scheduling methods are planning and scheduling techniques mostly used in construction and manufacturing industries where repetitive operations are abundant. Line of balance 1 au this work is licensed under a creative commons attribution 3. Learners will discover the key project scheduling techniques and procedures including. Line of balance mosaic projects project management. Lob collects, measures and presents information relating to time, cost and completion. The lob is a variation of linear scheduling methods that allows the project activities to stay. Line of balance lob is a manual planning and scheduling technique. The line of balance lob scheduling technique was originated by the goodyear company in the early 1940s and was developed by the u. So lets go through an example for a line of balance calculation.
Line balancing techniques to improve productivity using work. Navy in the early 1950s for the programming and control of. Feb 24, 2017 line of balance lob is a management control process used in construction where the project contains blocks of repetitive work activities, such as roads, pipelines, tunnels, railways and highrise buildings. Lob collects, measures and presents information relating to time, cost and completion, and presents it against a specific plan. Line balancing techniques to improve productivity using. If i ask you to develop a line of balance schedule for a particular project, example could be a road, that consists of 20 sections or units. Video created by columbia university for the course construction scheduling. Line balancing is the assignment of work elements to stations in a line. Apr 25, 2014 as the requirement of a project the method like critical path method cpm, linear scheduling method lsm, and line of balance lob are applied on it. Feb 23, 2016 the line of balance lob scheduling technique was originated by the goodyear company in the early 1940s and was developed by the u. Scheduling techniques production planning and control. The line of balance method lob is a resource driven scheduling system for projects with repetitive activities.
Linebalancing strategy is to make production lines stretchy enough to absorb external and internal indiscretion. Most common scheduling techniques in project management. Its objective is to schedule the activities determine their start and finish times so that a project deadline is met using predefined resource availability limits. It shows the process, status, background, timing and phasing of the project activities, thus providing management with measuring tools that help. Scheduling optimization with line of balance and start. Lineofbalance has been successfully used as the principal scheduling tool in large. First course on how to create dynamic 3d gantt charts using simple excel charts at 95% off. Of all the project scheduling techniques, the task list is without a doubt, the simplest. The yaxis identifies the work areas that define the project. The line of balance technique dealt with in this chapter is a resourcedriven schedule. Studies show that a major reason the construction industry has been slow to. Line balancing techniques for manufacturing smf ccl. In order to model the schedule, the paper demonstrates the startfinish relation and its. Pdf line of balance technique somil agarwal academia.
Line of balance scheduling technique lob has various intrinsic advantages, and offers solutions to many scheduling related problems, relative to the cpm scheduling technique. It was first applied to industrial manufacturing and production. This paper outlines the key steps to take when starting out a line balancing. Line of balance lob is a management control process used in construction where the project contains blocks of repetitive work activities, such as roads, pipelines, tunnels, railways and highrise buildings. Line of balance lob lob is a planning methodology to optimize resources used lob is a good visual tool that lets us see if a construction program can be achieved with the minimum waiting time between tasks it is primarily used on projects that have repeated elements like highways, pipelines, highrise buildings, hotel bedrooms, bridge etc. Lineofbalance is a graphical technique which can be used to plan and manage work flow. One production scheduling and control technique which tries to surpass the cpm difficulties for multistorey building scheduling is the line of balance lob technique. Arguably, because of their relative simplicity, these techniques are still almost the only ones taught nowadays in most introductory courses to scheduling in. Line of balance technique scheduling production processes.
The method addresses to the particularities of construction projects more effectively than the critical path method does. Line of balance lob designing buildings wiki share your construction industry knowledge. The processes used to accomplish the assembly of the components can be divided into three major. According to esigning buildings wiki 2017, line of balance lob is a management control process used in construction where the project contains blocks of repetitive work activities, such as roads, pipelines, tunnels, railways and highrise buildings. Project scheduling construction complete guide to project. In the line of balance diagram, the xaxis represents as in the bar chart the timeline of the project. The line of balance technique is a useful scheduling tool when there is a fixed quantity of a customized product that is to be delivered to a client over a period of time.
Application of line of balance lob in construction projects. In the lineofbalance diagram, the xaxis represents as in the bar chart the timeline of the project. The study was performed through a series of interviews conducted with line of balance scheduling practitioners and experts. The definition of the line of balance is a resource driven scheduling method or tool, the line of balance, for a repetitive construction project or, linear construction projects. The line of balance also known as the vertical production method is a graphical technique that can be used in conjunction with arrow or precedence diagrams.
Delivery schedule assemblylead time chart 20042012 1 run out technique. Elements of the line of balance technique include the following. Lets look at a 100 segment pipeline project and the process of planning and scheduling a. Scheduling optimization with line of balance and startfinish.
Elements of a line of balance study the line of balance lob technique is comprised of the following four 4 elements or phases listed in the sequence in which each is normally developed when conducting a line of balance study of a production process. The technique for developing a linear schedule involves a simple four step process. This chapter addresses an alternative to critical path method cpm scheduling. The lineofbalance scheduling technique lobst is a linear scheduling method that allows the balancing of the operations such that each activity is continuously and. Application of line of balance lob in construction. Line of balance lob the lob technique is a scheduling method developed by the u. To study the progress of jobs at regular intervals and.
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