In the lineofbalance diagram, the xaxis represents as in the bar chart the timeline of the project. This chapter addresses an alternative to critical path method cpm scheduling. Scheduling techniques production planning and control. 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. Line balancing is the assignment of work elements to stations in a line. 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. Lob collects, measures and presents information relating to time, cost and completion, and presents it against a specific plan. The technique for developing a linear schedule involves a simple four step process. The line of balance scheduling technique is appropriate for repetitive work.
This paper outlines the key steps to take when starting out a line balancing. Line balancing techniques for manufacturing smf ccl. Application of line of balance scheduling technique international. Linear scheduling methods are planning and scheduling techniques mostly used in construction and manufacturing industries where repetitive operations are abundant. Lob collects, measures and presents information relating to time, cost and completion. Application of line of balance lob in construction projects. 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. This method is simple and familiar to most people, and is especially useful for smaller projects. 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. The lob is a variation of linear scheduling methods that allows the project activities to stay.
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. The construction industry currently utilizes the critical path method scheduling technique cpm to plan and manage most construction projects. The line of balance lob scheduling technique was originated by the goodyear company in the early 1940s and was developed by the u. 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 lineofbalance scheduling technique lobst is a linear scheduling method that allows the balancing of the operations such that each activity is continuously and. Scheduling optimization with line of balance and start. Line balancing production and operations management in production, line balancing is useful tool. The processes used to accomplish the assembly of the components can be divided into three major. Assembly systems and line balancing discrete products are assembled from components.
Studies show that a major reason the construction industry has been slow to. Line of balance lob the lob technique is a scheduling method developed by the u. Modified lineofbalance has been the dominant scheduling method in. 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. Department of civil engineering, regional engineering college calicut, university of calicut, 2002.
Line of balance lob is a manual planning and scheduling technique. Line of balance lob linear construction operations and. 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. This is a list of tasks per team member, documented in a spreadsheet or word processor. Of all the project scheduling techniques, the task list is without a doubt, the simplest.
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. To study the progress of jobs at regular intervals and. Critical path method cpm tutor for construction scheduling. It shows the process, status, background, timing and phasing of the project activities, thus providing management with measuring tools that help. Lineofbalance is a graphical technique which can be used to plan and manage work flow. Line of balance 1 au this work is licensed under a creative commons attribution 3. 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. The line of balance technique dealt with in this chapter is a resourcedriven schedule. Line of balance mosaic projects project management. The yaxis identifies the work areas that define the project. The lineofbalance also known as the vertical production method is a graphical technique that can be used in conjunction with arrow or precedence diagrams. Lets look at a 100 segment pipeline project and the process of planning and scheduling a. Another example of line balancing based on longest task time rule.
Lob collects, measures and presents information relating to time, cost. In the line of balance diagram, the xaxis represents as in the bar chart the timeline of the project. In order to model the schedule, the paper demonstrates the startfinish relation and its. It is suitable for construction projects because of their large degree of repetition. Arguably, because of their relative simplicity, these techniques are still almost the only ones taught nowadays in most introductory courses to scheduling in. 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. This strategy involves setting a planned rate of production for necessary materials to be fabricated within a particular time frame. 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. This paper describes a lineofbalance based schedule planning and control system, and its connection with lean construction methods, using a commercial software package called. 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. Linebalancing strategy is to make production lines stretchy enough to absorb external and internal indiscretion.
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. Pdf line of balance technique somil agarwal academia. Also covered is the line of balance scheduling method which is a. 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. Evidence on the use of line of balance as a scheduling technique already exists in the. Line of balance scheduling technique lob has various intrinsic advantages, and offers solutions to many scheduling related problems, relative to the cpm scheduling technique. 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. So lets go through an example for a line of balance calculation.
Line balancing production and operations management. The line of balance lob technique is a tool that presents actual progress versus planned progress of projects that manufacture or construct repetitive projects. One production scheduling and control technique which tries to surpass the cpm difficulties for multistorey building scheduling is the line of balance lob technique. Delivery schedule assemblylead time chart 20042012 1 run out technique. Lineofbalance has been successfully used as the principal scheduling tool in large. The first step is to divide the work into activities and crews that can move as units along the sequence of. 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. 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. 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. Arranging stations in a sequence line for the product to move from one station to the next until its completion at. Oct 09, 2015 another example of line balancing based on longest task time rule.
Line of balance technique scheduling production processes. Learners will discover the key project scheduling techniques and procedures including. Most common scheduling techniques in project management. Project scheduling construction complete guide to project. 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. Line of balance lob1 is a method of showing the repetitive work that may. Application of line of balance lob in construction. It was first applied to industrial manufacturing and production. 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. Elements of the line of balance technique include the following. The target output rate for this project, which is r, is three sections per week.
Line of balance lob designing buildings wiki share your construction industry knowledge. 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. First course on how to create dynamic 3d gantt charts using simple excel charts at 95% off. 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. 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. 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. In order to balance a production line in sewing floor a line was chosen and necessary data was accumulated from the line. Line of balance is a graphical technique which can be used to plan and manage work flow. R sreemahadevan pillai a comprehensive study of project scheduling techniques and the introduction of new techniques thesis. It shows the process, status, background, timing and phasing of the project activities, thus providing management with measuring tools. It is utilized in determining production progress in terms of percent of task completion. The study was performed through a series of interviews conducted with line of balance scheduling practitioners and experts. The goal is to achieve the desired output rate with the smallest number of workstations. Scheduling optimization with line of balance and startfinish.
Linear scheduling methods are planning and scheduling techniques mostly used in construction and manufacturing industries where repetitive operations are. The use of the line of balance scheduling method has been increasing, especially on the construction industry companies of brazil, finland and australia. Navy in the early 1950s for the programming and control of. Line balancing techniques to improve productivity using. 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. The main objective is to find the required resources for. Line of balance scheduling project scheduling and management. Resourcedriven scheduling, on the other hand, is different and is more focused on resources. 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. May 20, 2018 first course on how to create dynamic 3d gantt charts using simple excel charts at 95% off.