Project Schedule Forecast and Control

2013 ◽  
pp. 225-240
Keyword(s):  
Project Schedule ◽  
And Control

scholarly journals The possibility of applying the program evaluation and review technique for construction project schedule management

2020 ◽  
Vol 17 (4) ◽  
pp. 115-121
Author(s):  
S. V. Bovteev ◽  
◽  
A. V. Mishakova ◽  
Keyword(s):  
Program Evaluation ◽  
Construction Project ◽  
Control Points ◽  
Project Schedule ◽  
Schedule Management ◽  
Work Duration ◽  
Key Events ◽  
And Control ◽  
High Degree ◽  
Probabilistic Nature

The program evaluation and review technique (PERT) was developed and first used more than sixty years ago and is now well known. This technique allows taking into account the probabilistic nature of the work duration, so it is used for scheduling projects, where the duration of all or some of the works can not be clearly determined due to the high degree of uncertainty of the external environment in which such projects are carried out. However, the problem of controlling the terms of project activities and key events of the project based on the program evaluation and review technique has not been studied well enough. This article investigates the possibilities of applying the program evaluation and review technique to track and control the construction project schedule. An algorithm for using this method to predict the probability of timely occurrence of control points and completion of the entire project is presented.

scholarly journals Socio-Organo Complexity, Project Schedule Performance and Underdamped Transient Motion

2020 ◽  
Vol 9 (4) ◽  
pp. 1-15
Author(s):  
Dimitris N. Antoniadis
Keyword(s):  
Project Management ◽  
Control Systems ◽  
Project Performance ◽  
Project Schedule ◽  
Management Processes ◽  
Project Complexity ◽  
And Performance ◽  
And Control ◽  
Made In ◽  
Main Factor

Complexity is an inherent property of all systems and a result of interconnections. In projects various systems come together to deliver the required outcome(s). The most common type of project complexity mentioned / considered in practice is the technical complexity and this has always been considered a main factor which affects project performance. Despite that, projects are delivered by people who interface ontinuously and therefore are effected by complexity, and in particular that caused by socio-organo interfaces and the boundaries between the various teams and parties. This has not been investigated. ocio-organo complexity leads to reduction in performance if interconnections are not managed. Research has been carried out to understand the effects of complexity through project management processes on project schedule and performance, aiming towards the development of a tool and identification of actions that will enable the management of these effects. The author presents results of five case studies, which demonstrate that socio-organo complexity affects performance and these results have similarities with the behaviour of underdamped control systems. The results have significant implications on the way socioorganisational complexity can be managed, how processes are implemented, but also enable parallels to be drawn between the fields of project management and control systems. Considering control systems theory proposals are made in this paper for actions to be taken which will contribute towards the management of the effects of socio-organo complexity on projects.

Study on Inspection and Adjustment of Engineering Construction Project Schedule Plan

2013 ◽  
Vol 380-384 ◽  
pp. 4604-4608
Author(s):  
Hong Lv ◽  
Long Han Zhang ◽  
Shi Wei Xu
Keyword(s):  
Construction Project ◽  
Control Methods ◽  
Project Schedule ◽  
Schedule Control ◽  
Engineering Construction ◽  
Planning And Control ◽  
Deviation Analysis ◽  
Ongoing Work ◽  
Engineering Construction Project ◽  
And Control

Project schedule control is one of the important control goals in project management. It is an important measure to ensure that the project is completed safely, reasonable arrangements for the resources supply and saving cost. Any of the projects must be by means of scientific planning and control methods in order to achieve the desired goals. Deviation analysis is an ongoing work in the progress of project, how to determine the deviation of project timely and accurately, the method that used is crucial. This paper chose a highway construction project as research object, using the Inspection Acts include Gantt chart, S-shaped curve and Banana-shaped curve of schedule, and made the comparative analysis for project to identify deviations and take measures to adjust in order to ensure the project is completed on schedule.

scholarly journals Project Parameter Estimation on the Basis of an Erp Database

2013 ◽  
Vol 5 (2) ◽  
pp. 49-58 ◽  
Author(s):  
Marcin Relich
Keyword(s):  
Data Mining ◽  
Knowledge Discovery ◽  
New Product Development ◽  
Enterprise Resource Planning ◽  
Resource Planning ◽  
Neural System ◽  
Project Schedule ◽  
Erp System ◽  
Fuzzy Neural ◽  
And Control

Abstract Nowadays, more and more enterprises are using Enterprise Resource Planning (EPR) systems that can also be used to plan and control the development of new products. In order to obtain a project schedule, certain parameters (e.g. duration) have to be specified in an ERP system. These parameters can be defined by the employees according to their knowledge, or can be estimated on the basis of data from previously completed projects. This paper investigates using an ERP database to identify those variables that have a significant influence on the duration of a project phase. In the paper, a model of knowledge discovery from an ERP database is proposed. The presented method contains four stages of the knowledge discovery process such as data selection, data transformation, data mining and interpretation of patterns in the context of new product development. Among data mining techniques, a fuzzy neural system is chosen to seek relationships on the basis of data from completed projects stored in an ERP system.

Scheduling and control of linear projects

1994 ◽  
Vol 21 (2) ◽  
pp. 219-230 ◽  
Author(s):  
Neil N. Eldin ◽  
Ahmed B. Senouci
Keyword(s):  
Dynamic Programming ◽  
Programming Approach ◽  
State Variables ◽  
Project Schedule ◽  
Numerical Illustration ◽  
Total Cost ◽  
Dynamic Programming Approach ◽  
Completion Date ◽  
And Control ◽  
Linear Projects

A two-state-variable, N-stage dynamic programming approach to scheduling and control of linear projects is presented. This approach accounts for practical considerations related to work continuity, interruptions, and lags between successive activities. In the dynamic programming formulation, stages represent project activities and state variables represent possible activity resources and interruptions at each location. The objective of the dynamic programming solution is to provide for the selection of resources, interruptions, and lags for production activities that lead to the minimum project total cost. In addition, the presented system produces a graphical presentation of the optimum project schedule and updates the original schedule based on update information input by the user. The updated schedule determines the new completion date, and forecasts the project new total cost based on the current project performance. A small linear project is provided as a numerical illustration of the system. Key words: dynamic programming, linear projects, scheduling systems, optimization of cost and scheduling durations.

Framework for enhanced progress tracking and control of linear projects

2014 ◽  
Vol 21 (1) ◽  
pp. 94-110 ◽  
Author(s):  
Tarek Hegazy ◽  
Mohamed Abdel-Monem ◽  
Dina Atef Saad
Keyword(s):  
Critical Path ◽  
Low Cost ◽  
Project Schedule ◽  
Content Type ◽  
Construction Productivity ◽  
Linear Scheduling ◽  
Road Project ◽  
New Formulation ◽  
And Control ◽  
Linear Projects

Purpose – This paper aims at improving progress tracking and control of repetitive projects by developing a novel framework that automates the documentation of as-built information directly into the project schedule and also introduces enhanced linear scheduling formulation to support project control decisions. Design/methodology/approach – The proposed framework uses e-mail technology to facilitate detailed tracking of daily as-built events of all parties through bidirectional communication between site and head office. It also provides a new formulation for more accurate critical path and linear scheduling computation to accurately update the project's time and cost during construction. Findings – Using a case study of a road project, the paper proves that the proposed framework reduces as-built documentation effort and its schedule updates are more responsive to all as-built events than traditional scheduling techniques. Research limitations/implications – The proposed method applies to linear projects (e.g. highways) and can be extended to other repetitive projects such as high-rise buildings. It can also be extended to include voice features and procedures for forensic schedule analysis. Practical implications – The developed methodology presents a low-cost approach to document timely progress information for decision makers of massive linear projects (often associated with infrastructure) to have better control over the execution of projects, save documentation time and cost, and avoid disputes and problems. Originality/value – This research contributes in improving construction productivity by collecting timely as-built information using affordable communication technologies. It also presents novel advancements to the existing scheduling and control techniques to suit linear projects, which are most challenging.

Control of Metal Alloy Oxidation with Electric Fields

1973 ◽  
Vol 31 ◽  
pp. 164-165
Author(s):  
R. R. Dils ◽  
P. S. Follansbee
Keyword(s):  
Electric Fields ◽  
Oxidation Process ◽  
Base Alloy ◽  
Oxide Surface ◽  
Platinum Electrodes ◽  
Insulating Layer ◽  
Iron Base Alloy ◽  
Alloy Oxidation ◽  
Aluminum Oxide Layer ◽  
And Control

Electric fields have been applied across oxides growing on a high temperature alloy and control of the oxidation of the material has been demonstrated. At present, three-fold increases in the oxidation rate have been measured in accelerating fields and the oxidation process has been completely stopped in a retarding field.The experiments have been conducted with an iron-base alloy, Pe 25Cr 5A1 0.1Y, although, in principle, any alloy capable of forming an adherent aluminum oxide layer during oxidation can be used. A specimen is polished and oxidized to produce a thin, uniform insulating layer on one surface. Three platinum electrodes are sputtered on the oxide surface and the specimen is reoxidized.

Evidence for a Blood Ganglion Barrier in the Superior Cervical Ganglion of the Rat

1982 ◽  
Vol 40 ◽  
pp. 204-204
Author(s):  
D. M. DePace
Keyword(s):  
Blood Vessels ◽  
Superior Cervical Ganglion ◽  
Peripheral Nerves ◽  
Time Schedule ◽  
Transmission Electron ◽  
Cervical Ganglion ◽  
The Central Nervous System ◽  
Cervical Ganglia ◽  
Capillary Circulation ◽  
And Control

The majority of blood vessels in the superior cervical ganglion possess a continuous endothelium with tight junctions. These same features have been associated with the blood brain barrier of the central nervous system and peripheral nerves. These vessels may perform a barrier function between the capillary circulation and the superior cervical ganglion. The permeability of the blood vessels in the superior cervical ganglion of the rat was tested by intravenous injection of horseradish peroxidase (HRP). Three experimental groups of four animals each were given intravenous HRP (Sigma Type II) in a dosage of.08 to.15 mg/gm body weight in.5 ml of.85% saline. The animals were sacrificed at five, ten or 15 minutes following administration of the tracer. Superior cervical ganglia were quickly removed and fixed by immersion in 2.5% glutaraldehyde in Sorenson's.1M phosphate buffer, pH 7.4. Three control animals received,5ml of saline without HRP. These were sacrificed on the same time schedule. Tissues from experimental and control animals were reacted for peroxidase activity and then processed for routine transmission electron microscopy.

Effects of renovascular hypertension on rat adrenal zona glomerulosa

1978 ◽  
Vol 36 (2) ◽  
pp. 582-583
Author(s):  
G. Mazzocchi ◽  
P. Rebuffat ◽  
C. Robba ◽  
P. Vassanelli ◽  
G. G. Nussdorfer
Keyword(s):  
Renovascular Hypertension ◽  
Left Kidney ◽  
Renin Angiotensin System ◽  
Plasma Renin ◽  
Zona Glomerulosa ◽  
Ultrastructural Changes ◽  
Albino Rats ◽  
Left Renal Artery ◽  
Angiotensin System ◽  
And Control

It is well known that the rat adrenal zona glomerulosa steroidogenic activity is controlled by the renin-angiotensin system. The ultrastructural changes in the rat zona glomerulosa cells induced by renovascular hypertension were described previously, but as far as we are aware no correlated biochemical and morphometric investigations were performed.Twenty adult male albino rats were divided into 2 experimental groups. One group was subjected to restriction of blood flow to the left kidney by the application of a silver clip about the left renal artery. The other group was sham-operated and served as a control. Renovascular hypertension developed in about 10 days: sistolic blood pressure averaged 165 ± 6. 4 mmHg, whereas it was about 110 ± 3. 8 mmHg in the control animals. The hypertensive and control rats were sacrificed 20 days after the operation. The blood was collected and plasma renin activity was determined by radioimmunological methods. The aldosterone concentration was radioimmunologically assayed both in the plasma and in the homogenate of the left capsular adrenal gland.

X-Ray Replication of Submicrometer Linewidth Patterns

1977 ◽  
Vol 35 ◽  
pp. 136-137
Author(s):  
Henry I. Smith ◽  
D.C. Flanders
Keyword(s):  
Electron Beam Lithography ◽  
Cross Sectional ◽  
X Ray ◽  
Electron Backscattering ◽  
Spatial Frequencies ◽  
Cross Sectional Profile ◽  
Carbon Foils ◽  
Sectional Profile ◽  
And Control ◽  
Soft Radiation

Scanning electron beam lithography has been used for a number of years to write submicrometer linewidth patterns in radiation sensitive films (resist films) on substrates. On semi-infinite substrates, electron backscattering severely limits the exposure latitude and control of cross-sectional profile for patterns having fundamental spatial frequencies below about 4000 Å(l),Recently, STEM'S have been used to write patterns with linewidths below 100 Å. To avoid the detrimental effects of electron backscattering however, the substrates had to be carbon foils about 100 Å thick (2,3). X-ray lithography using the very soft radiation in the range 10 - 50 Å avoids the problem of backscattering and thus permits one to replicate on semi-infinite substrates patterns with linewidths of the order of 1000 Å and less, and in addition provides means for controlling cross-sectional profiles. X-radiation in the range 4-10 Å on the other hand is appropriate for replicating patterns in the linewidth range above about 3000 Å, and thus is most appropriate for microelectronic applications (4 - 6).

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