General Shapes of the Learning Curve. From this information, it is evident that the concrete forms are set prior to tying the reinforcing steel and that the concrete is placed after the rebar has been tied and the concrete has been ordered from the supplier. Ideal resource utilization occurs when all activities have the same production rate, or slope.
Activities are then often identified by the numbers of the two events or nodes that precede and follow them. Construction Project Scheduling And Control - 4th Edition By Saleh A Mubarak (hardcover) : Target. 22 - 2 - 2 = 18 days Interfering float (also called shared float) is the float an activity might have that is subject to use by other activities. Another contract provision, taken from a contract for the construction of a public school, defines float as being owned by both the owner and the contractor. Give an example of a network loop.
Ltd. Printer/Binder: Edwards Brothers Cover Printer: Lehigh-Phoenix Color Text Font: Minion. In some cases, they represent only the passage of time. Access to over 1 million titles for a fair monthly price. To facilitate sorting, filtering, and reporting the schedule, activity codes and a work breakdown structure (WBS) identification code are defined and assigned to each activity. In some cases, a CPM analysis is required along with the bid. What does this really mean? Its preparation requires the owner or contractor to develop a clear idea of the operations needed and their sequencing and timing. The reporting capabilities of scheduling programs play an important role for project managers and are one reason why the programs are powerful and important management tools. Unless otherwise specified, the Contractor will be permitted to do the work between the hours of 7:45 A. and 4:30 P. M., Monday through Friday. Foundation excavation. Construction Project Scheduling and Control (4th ed. Variance 25 49 4 78. If the Owner's Representative furnishes a form, the Contractor may be requested, on or before the last day of each month, to indicate the status of work actually completed during the preceding estimate period.
Production rates should also be reviewed to ensure that they are realistic and achievable. Cost Concepts as They Relate to Schedule Compression 240. 1 is set up to provide the probability of occurrence for a variety of standard deviations. PDF] Construction Project Management - Planning and Scheduling By Henry F.W. Naylor Book Free Download –. The first three steps, familiar to most schedulers, are as follows: 1. Draw an arrow diagram that depicts the proper logic for the remodeling of a school, as described below: Activity. Regardless of the scheduling technique used, successfully using scheduling information. In that case, one would not need or want to spend the time to model the project in a lot of detail unless required by the contract. However, it would not be cost effective to randomly select any activity for shortening. Control Your ERP Destiny: Reduce Project Costs, Mitigate Risks, and Design Better Business Solutions by Steven Scott Phillips.
SHORT-INTERVAL SCHEDULES IN THE LITERATURE An examination of more than 15 textbooks on planning and scheduling disclosed an interesting phenomenon: Textbooks tend to provide very little information on short-interval schedules. W Weather, 65–66, 178, 185, 187 Web-based Programs, 151 Work breakdown structure (WBS), 8–13, 136–137, 152–153, 163 Working days, 17, 52, 58–59, 63–65, 114, 135–136, 148, 151. Just as long-lead items are tracked by the general contractor, so too might subcontractors track the requisition of materials and equipment. A portion of the project was to be completed within 15 months, and the entire project was to be completed in 18 months. Contractor shall submit for Owner's Representative's approval, a progress schedule showing rate of progress expected for the various phases of work. Steps for Updating a Schedule 180. Construction project scheduling and control 4th edition pdf free download windows 10. 3 and develop a clear understanding of the way the above-mentioned percentages were derived. Another assumption is that resource consumption is constant over the duration of an activity. An example of a horse blanket schedule is shown in Figure 1.
This assumption is rarely reasonable, especially on large or complex projects. It is the scheduler's task to then determine ways in which the logic can be modified or durations for selected activities can be reduced to eliminate the negative float. Also check out Derek's blog where he goes deep on the real-world of scheduling and construction regularly. As the critical path of a network is decreased, it must be remembered that all noncritical paths within the network lose a like amount of total float. Once the variances of the critical activities have been totaled, the variance along the critical path is known. An owner may, however, elect to return most of the retainage at substantial completion and withhold only an amount to "cover" the anticipated costs of completing the punch list items. Construction project scheduling and control 4th edition pdf free. Army Corps of Engineers employed the following provision in one of its contracts. Payment for delivered equipment and material shall not exceed 50 percent of the purchase value until the Contractor has delivered to the Owner's Representative five sets of acceptable manufacturer's operating and maintenance instructions covering that item of equipment or equipment assembly provided in this contract.
The 90-day schedule is one in which sufficient detail is required in order to show the nature of the activities that will occur on a weekby-week basis. Workers were to be paid $20 per hour, which included all fringes. It is common for final payment to be made from 1 to 3 months after substantial completion. For example, mobilization can be a large cost item. As before, the early and late event times for the last event are assumed to be the same. One public agency was so enamored by a general contractor's use of short-interval schedules that it decided to include a contract provision that addressed the 2-week short-interval schedule. Set trusses and roof frame. It is important for the user of such software to recognize the different algorithms that might be used by the software. Triple Cities completed the project on time but still filed a claim for delay damages from the state. As Amazon reviewer, Evgeny Ivlev noted, "It touches each discipline showing interfaces between all of them. " 2............................................................................... 1........................................... Sequence Step. Similarity between the DML Concept and the Linear Scheduling Method (LSM) 355. Resource Profile Showing Utilization of Bulldozers. In this example, let's assume that the subcontractors would want to give an estimate that will not be understated in 95 percent of the cases, meaning that we want a high level of confidence that the estimate is not too small.
Long-lead-time items may be delivered early or scarce materials may be purchased early to ensure that they will be available when needed. 8 includes two scenarios designed to help explain this fundamental issue, especially as it relates to the use of dummies. Summary Reports 277. For the most part, the computer scheduling terms are used in the same fashion in most scheduling programs. Obviously, in an 84-hour workweek, more than half of the time will be worked at premium wages. Note that the suspension provisions may only grant equitable time extensions to the contractor or they may also stipulate compensation to the contractor. Activity codes should be defined and organized to effectively represent different facets of the. 11 Call for inspection.
Verify that major pieces of equipment are not assigned to two different work items that are to take place concurrently. As suggestions of potential hazards are offered, means are sought to minimize or eliminate those potential hazards. 7/16" OSB CMU Block wall.
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