Time is a murderer: The cost of critical path drag in emergency response

2013 ◽  
pp. 536-565
Keyword(s):  
Emergency Response ◽  
Critical Path ◽  
The Cost

scholarly journals AN EXACT SOLUTION FOR THE RESOURCE-CONSTRAINED CONSTRUCTION SCHEDULING PROBLEM

2016 ◽  
Vol 8 (2) ◽  
pp. 71-78
Author(s):  
Bartłomiej Sroka ◽  
Elżbieta Radziszewska-Zielina
Keyword(s):  
Execution Time ◽  
Critical Path ◽  
Scheduling Problem ◽  
Resource Constrained ◽  
Building Projects ◽  
Construction Scheduling ◽  
Program Sample ◽  
Resource Constrained Scheduling Problem ◽  
The Cost ◽  
Exponential Complexity

Reduced time and, by the same token, the cost of the project is a crucial factor in contemporary construction. This article presents a method for the exact optimisation of a resource-constrained scheduling problem. Based on the Critical Path Method, graph theory and linear programming, an algorithm was developed and the FROPT program was written in Matlab to minimise the execution time of the task. By using the newly-created program, sample networks were calculated and the results were compared with results obtained by using the MS Project scheduling program (using approximation algorithm). The execution time obtained by using FROPT were on average 10% shorter than those obtained using MS Project. In selected cases the improvement in execution time reached 25%. A deterministic approach to the problem may shorten planned project times and bring financial benefits. Due to the exponential complexity of the algorithm, it is most useful in solving small or highly coherent networks. The algorithm and program may result in benefits not offered by commercial software for planners of building projects.

Recovering the Waiho – Emergency response and recovery of the Waiho River Bailey Bridge

2021 ◽  
Author(s):  
Jeremy Waldin ◽  
Ben Baty
Keyword(s):  
Emergency Response ◽  
West Coast ◽  
Team Leader ◽  
Storm Event ◽  
Bridge Management ◽  
The West ◽  
Response Team ◽  
Response And Recovery ◽  
Management Contract ◽  
The Cost

<p>Waiho – (verb) (-ngia,-tia) <i>to let be, leave alone, put, place, ignore.</i></p><p>SH6 Waiho Bailey Bridge is located just south of Franz Josef township in the South Island of New Zealand and is a critical connection for the West Coast. The Bailey bridge was first constructed in 1990 and has since been raised and extended three times due to significant aggradation of the riverbed. During a massive storm event on March 26, 2019 the northern abutment and northern- most pier were washed out leading to collapse of several spans of the bridge. The cost caused by the loss of the bridge was estimated to be in the order of $2-3M per day. Consequently, there was intense pressure on Waka Kotahi NZ Transport Agency to restore access across the river.</p><p>As Team Leader and Deputy Team Leader of the West Coast Bridge Management Contract, Jeremy Waldin and Ben Baty led the $6.5M emergency recovery managing an emergency response team which worked across multiple organisations to recover this 170m long bridge in just 18 days.</p>

An Economic Analysis and Approach for Health Care Preparedness in a Substate Region

2015 ◽  
Vol 9 (4) ◽  
pp. 344-348 ◽  
Author(s):  
Benoit Stryckman ◽  
Thomas L. Grace ◽  
Peter Schwarz ◽  
David Marcozzi
Keyword(s):  
Health Care ◽  
Emergency Response ◽  
Return On Investment ◽  
Catchment Area ◽  
Cost Benefit Analysis ◽  
Cost Benefit ◽  
Benefit Analysis ◽  
Response Team ◽  
The Cost ◽  
Positive Return

AbstractObjectiveTo demonstrate the application of economics to health care preparedness by estimating the financial return on investment in a substate regional emergency response team and to develop a financial model aimed at sustaining community-level disaster readiness.MethodsEconomic evaluation methods were applied to the experience of a regional Pennsylvania response capability. A cost-benefit analysis was performed by using information on funding of the response team and 17 real-world events the team responded to between 2008 and 2013. By use of the results of the cost-benefit analysis as well as information on the response team’s catchment area, a risk-based insurance-like membership model was built.ResultsThe cost-benefit analysis showed a positive return after 6 years of investment in the regional emergency response team. Financial modeling allowed for the calculation of premiums for 2 types of providers within the emergency response team’s catchment area: hospitals and long-term care facilities.ConclusionThe analysis indicated that preparedness activities have a positive return on their investment in this substate region. By applying economic principles, communities can estimate their return on investment to make better business decisions in an effort to increase the sustainability of emergency preparedness programs at the regional level. (Disaster Med Public Health Preparedness. 2015;9:344–348)

Paper 8: Maintenance Planning Applied to Plant Auxiliaries in the Central Electricity Generating Board

1966 ◽  
Vol 181 (14) ◽  
pp. 87-118
Author(s):  
V. J. Wright ◽  
R. E. Seymour ◽  
N. D. Norris
Keyword(s):  
Capital Investment ◽  
Critical Path ◽  
Effective Control ◽  
Service Experience ◽  
Technical Data ◽  
Design Engineers ◽  
Power Stations ◽  
Economic Methods ◽  
Minimum Requirements ◽  
The Cost

The C.E.G.B. operates 230 power stations of various ages and output capacities representing a total capital investment of some £2400 million. The steam conditions, sizes of generating units, and complexity of the installed plant reflect the stage of technical development at the time of their construction. These factors influence the cost of production at individual stations as also do the nature and cost of fuel. The economic level of maintenance at each station is thus dependent upon a number of factors and must generally be established locally. This places an obligation on the maintenance engineer to collect and consider economic, in addition to technical, data. Also, service experience must be fed back to the design engineer so that future plant designs may be improved. Unless a simple and effective control system is employed paper work can become an intolerable burden. Power station maintenance can be broadly divided between: (1) work which can only be carried out while a generating unit is shut down; (2) work which can be carried out with the main plant on load. The first category has received the greatest attention, since the cost of keeping a modern generator out of service can be substantial. Planning of this work is based on Critical Path Analysis techniques which are now well known and widely practised. However, the day-to-day maintenance of a large variety of auxiliary plant also presents a heavy planning burden upon the maintenance department. The basic minimum requirements for the effective local control of this work have been examined, while the most economic methods of: (a) co-ordinating maintenance in a number of stations in the best national interest, and (b) ensuring that service experience is fed back to design engineers are also receiving attention.

FINANCIAL MANAGEMENT OF POLLUTION RESPONSE EFFORT—BEFORE, DURING, AND AFTER THE SPILL

1989 ◽  
Vol 1989 (1) ◽  
pp. 189-191
Author(s):  
Darryle M. Waldron
Keyword(s):  
Emergency Response ◽  
Oil Spill ◽  
Financial Management ◽  
Contingency Planning ◽  
Response Effort ◽  
Clean Environment ◽  
The Social ◽  
Oil Spill Response ◽  
The Cost ◽  
Business Philosophy

ABSTRACT Oil spill response has evolved tremendously over the past 20 years in technology and technique, as well as in the social demand for a clean environment. The cost of response to a pollution incident has likewise grown at a time in which both federal and private funds are less available. Although the spiller may publicly claim he will clean up the spill no matter what the cost, cost becomes an issue as the bills start coming in. The purpose of this paper is to provoke consideration of the financial management of an oil spill response, not only to reduce costs, but to reduce confusion during the early days of a response. As in any type of emergency response, contingency planning is essential for success. Having designated, but flexible, procedures and plans in place before the spill will allow the experts to concentrate on mitigation instead of future litigation. The ideas presented here are based on experience in federal responses, common sense, basic financial management principles, and a business philosophy of integrity and efficiency.

scholarly journals Evaluasi Penjadwalan Waktu Pada Proyek Pembangunan Rumah Tipe 30 Di Istana Tegal Besar Kabupaten Jember Dengan Metode CPM

2018 ◽  
Vol 5 (2) ◽  
pp. 153
Author(s):  
Firdaus Hidayatul Iman ◽  
Hadi Wahyono ◽  
Eka Bambang Gusminto
Keyword(s):  
Action Research ◽  
Critical Path ◽  
Secondary Data ◽  
Primary Data ◽  
Land Uses ◽  
Critical Path Method ◽  
Housing Type ◽  
Building Type ◽  
Time Critical ◽  
The Cost

This research was conducted to evaluate the scheduling of time in the project of building type 30 house in Tegal Besar Jember Palace. This research is an action research research using CPM method. The data used in this research are primary data and secondary data. Primary data in this research is data about how long building type 30 housing and expenses incurred to build type 30 house in Tegal Besar Palace Jember. Based on the result of research known that building of type 30 house in Tegal Besar Jember Palace based on CPM method for 54 days. While the cost out to build a type 30 house based on the critical path CPM method of Rp 43.983403. In terms of cost, the completion of the projects is no different because PT. Kinansyah Adi Jaya Land uses wholesale system and housing type 30 subsidized by government.Keywords: Time, Critical Path, Critical Path Method (CPM)

scholarly journals Contribution for increasing the manufacturing companies productivity using a tracking and planning production program

2018 ◽  
Vol 184 ◽  
pp. 03006
Author(s):  
Iaroslav Francisc Pişec ◽  
Alin Pop
Keyword(s):  
Production Process ◽  
Real Time ◽  
Machine Tools ◽  
Critical Path ◽  
Planning Method ◽  
Manufacturing Companies ◽  
Production Program ◽  
The Cost ◽  
Complex Parts ◽  
Planning Production

In this paper is presented roughly a tracking and planning production program. The major challenge for manufacturing companies is to have the highest efficiency regarding the productivity. For this reason, the best way to achieve this is to track all elements from production process and to plan all phases as well as possible. The method used for planning production, is the Critical Path Method (CPM) because this kind of planning method determinates in advance the time of fabrications of complex parts. Using this tracking and planning production program, the companies can check the machine tools workload, can analyse the capacity, can assign the proper equipment for part’s fabrication, can estimate the delivering products time and also the cost of it. One of the advantages is that this information is provided on real time.

Study on Application of Critical Path to Project Time Management

2011 ◽  
Vol 328-330 ◽  
pp. 368-371 ◽  
Author(s):  
Li Xin Dai ◽  
Zong Li
Keyword(s):  
Time Management ◽  
Completion Time ◽  
Critical Path ◽  
Network Planning ◽  
Project Manager ◽  
Staff Members ◽  
Planning Phase ◽  
The Cost

Most resources used in a project will have an easily determined cost. We need to know which staff members can work on which parts of a project and what needs to be done, and when. Project time management should be broken down, step by step, just as other parts of the project are broken down in the planning phase. This will help make sure that everything is done when it needs to be, and to keep the project from going over its budget because it went well past the time scheduled for it. A project manager often need to control the whole time of the project and grasp the key process in those tasks which can shorten the period and reduce the cost. This paper discusses the algorithm of AOE-net in the critical path and its application to evaluate the completion time in the network planning of project time management.

scholarly journals A symbolic shortest path algorithm for computing subgame-perfect Nash equilibria

2015 ◽  
Vol 25 (3) ◽  
pp. 577-596 ◽  
Author(s):  
Pedro A. Góngora ◽  
David A. Rosenblueth
Keyword(s):  
Nash Equilibrium ◽  
Model Checking ◽  
Critical Path ◽  
Shortest Paths ◽  
Subgame Perfect Nash Equilibrium ◽  
Graph Games ◽  
Optimal Paths ◽  
Minimum Number ◽  
The Cost ◽  
Extensive Games

AbstractConsider games where players wish to minimize the cost to reach some state. A subgame-perfect Nash equilibrium can be regarded as a collection of optimal paths on such games. Similarly, the well-known state-labeling algorithm used in model checking can be viewed as computing optimal paths on a Kripke structure, where each path has a minimum number of transitions. We exploit these similarities in a common generalization of extensive games and Kripke structures that we name “graph games”. By extending the Bellman-Ford algorithm for computing shortest paths, we obtain a model-checking algorithm for graph games with respect to formulas in an appropriate logic. Hence, when given a certain formula, our model-checking algorithm computes the subgame-perfect Nash equilibrium (as opposed to simply determining whether or not a given collection of paths is a Nash equilibrium). Next, we develop a symbolic version of our model checker allowing us to handle larger graph games. We illustrate our formalism on the critical-path method as well as games with perfect information. Finally, we report on the execution time of benchmarks of an implementation of our algorithms

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