scholarly journals Analysis of an Anomaly: The Increase in Time Float following Consumption

2014 ◽  
Vol 2014 ◽  
pp. 1-12 ◽  
Author(s):  
Jianxun Qi ◽  
Zhixiong Su
Keyword(s):  
Completion Time ◽  
Start Time ◽  
Project Completion ◽  
Activity Networks ◽  
Different Types ◽  
Project Plan ◽  
Time Float

One fundamental axiom for project plan and schedule relates to the notion that time float will be reduced following its consumption. However, an anomalous scenario can emerge in which an activity’s time float increases following its consumption. By exploring the associations between time float and paths in activity networks, we (a) reveal the conditions under which the anomaly occurs and (b) summarize laws related to total float. An activity’s total float increases in parallel with its duration prolongation within a given boundary but remains constant or decreases in parallel with a prolongation outside the boundary. Furthermore, whereas a prolongation of an activity’s duration in excess of classic total float does not delay project completion time, a lag of its start time to a degree slightly greater than the total float does. This analysis reveals different types of total float that correspond to different ways of usage. From this, we offer definitions for translation total float and prolongation total float that deviate from traditional conventions regarding the uniqueness of total float.

Evaluating the project completion time when activity networks follow beta distribution

2020 ◽  
pp. 2150110
Author(s):  
Y. H. Abdelkader ◽  
H. M. Barakat ◽  
T. S. Taher
Keyword(s):  
Beta Distribution ◽  
Completion Time ◽  
Independent Random Variables ◽  
Recursive Method ◽  
Project Completion ◽  
Activity Networks ◽  
Approximation Errors ◽  
Distribution Type ◽  
Upper Estimate ◽  
Activity Times

By using a recursive method, we determine the project completion time when the activity times are distributed according to a beta distribution. The [Formula: see text]th moment of the maximum of non-identical independent random variables following this distribution-type is evaluated. Applicability and appropriateness of the beta model are illustrated by some examples, which show that the suggested estimate program evaluted and review technique of the project completion time is located between the lower bound estimate (PERT) and the upper estimate that was obtained by Kambarowski An upper bound on the expected completion time of PERT networks, Eur. J. Oper. Res. 21(2) (1985b) 206–212. Moreover, this estimate gives less values of the approximation errors than most of the other known estimates.

scholarly journals Effect of scent on comfort of aircraft passengers

Work ◽  
2021 ◽  
Vol 68 (s1) ◽  
pp. S273-S280
Author(s):  
Xinhe Yao ◽  
Yu Song ◽  
Peter Vink
Keyword(s):  
Completion Time ◽  
Aircraft Cabin ◽  
Different Types ◽  
The Relationship ◽  
Over Time

BACKGROUND: Scents may influence the perceived comfort of an environment. There are only a few studies conducted on the relationship between scent and comfort in aircraft cabin. OBJECTIVES: The goal of this research is to explore whether relationships between scents and perceived comfort can be found for passengers in an aircraft cabin. METHODS: 276 participants joined an experiment in a Boeing 737 fuselage. The participants were divided into nine groups and each joined a session for 60 minutes with the exposure to different scents. The effect of the odor was measured by a set of questionnaires at the beginning and at the end of the session. Results of questionnaires were analyzed regarding the effects on the completion time, of the type of scents, of the intensity of the scent and on gender. RESULTS: Significant differences were found at the beginning and at the end of the experiment regarding comfort and emotion, but sometimes no relations could be established. The influence of different scents on comfort/discomfort varied and changed over time. However, in all scenarios, participant’ scores on emotion decreased. Additionally, the added scents influenced the linearity between the changes in comfort and discomfort. CONCLUSIONS: Smell could influence the perceived comfort/discomfort of aircraft passengers over time, and different types of smells have different effects on passengers. The preferences on scents are diverse, which highlights the need for personalization in aircraft cabin design.

Text Analysis of Project Completion Reports

2021 ◽  
Author(s):  
César E. Montiel Olea ◽  
Leonardo R. Corral
Keyword(s):  
Text Analysis ◽  
Text Documents ◽  
Project Completion ◽  
Analysis Tools ◽  
Development Effectiveness ◽  
Different Types ◽  
Potential Applications ◽  
Project Cycle ◽  
Main Instrument ◽  
Unique Dataset

Project Completion Reports (PCRs) are the main instrument through which different multilateral organizations measure the success of a project once it closes. PCRs are important for development effectiveness as they serve to understand achievements, failures, and challenges within the project cycle they can feed back into the design and execution of new projects. The aim of this paper is to introduce text analysis tools for the exploration of PCR documents. We describe and apply different text analysis tools to explore the content of a sample of PCRs. We seek to illustrate a way in which PCRs can be summarized and analyzed using innovative tools applied to a unique dataset. We believe that the methods presented in this investigation have numerous potential applications to different types of text documents routinely prepared within the Inter-American Development Bank (IDB).

Project Completion Time and Cost Prediction Using Change Point Analysis

2015 ◽  
Vol 31 (5) ◽  
pp. 04014086 ◽  
Author(s):  
Seyed Taha Hossein Mortaji ◽  
Rassoul Noorossana ◽  
Morteza Bagherpour
Keyword(s):  
Change Point ◽  
Completion Time ◽  
Change Point Analysis ◽  
Cost Prediction ◽  
Project Completion ◽  
Point Analysis

ANALISIS PENERAPAN SISTEM PENJADWALAN DENGAN METODE PERT PADA PROYEK KONSTRUKSI (STUDI KASUS: REHABILITASI DAN PENINGKATAN INFRASTRUKSI PASAR TRADISONAL KOTA MALANG)

2021 ◽  
Vol 14 (2) ◽  
pp. 19
Author(s):  
Faris Rizal Andardi
Keyword(s):  
Completion Time ◽  
Total Duration ◽  
Infrastructure Projects ◽  
Scheduling System ◽  
Project Completion ◽  
Traditional Market ◽  
Simulation Results ◽  
Market Infrastructure

PERT is a simplified software, to produce the expected project completion probability based on the duration or duration of a particular contract. In developing the PERT method a lot of research was carried out to perfect this method. The purpose of this study is to determine the overall duration of project completion, the magnitude of the project probability that can be completed in less than 170 days and more than 170 days, and the project completion time with the highest probability. Results of Analysis of Implementation of Scheduling System with PERT Method in Rehabilitation and Improvement of Traditional Market Infrastructure Projects in Malang City is the total duration of simulation results obtained 168 days faster than the 172 day plan. The probability of completing the 168 day project is 50%, while the probability of completing the 172 day project is 85.31%. The highest chance of the project being completed is 99.97%, with a duration of 181 days.

Experimental Investigation of Input Device Suitability for CAD Operations

2006 ◽  
Author(s):  
Sudheer Bayanker ◽  
Joshua D. Summers ◽  
Anand K. Gramopadhye
Keyword(s):  
Experimental Investigation ◽  
Human Computer Interaction ◽  
User Interfaces ◽  
Undergraduate Student ◽  
Computer Aided Design ◽  
Completion Time ◽  
Input Device ◽  
Computer Aided ◽  
Different Types ◽  
Aided Design

This paper presents an experimental investigation into input suitability for human-computer interaction during computer aided design operations. Specifically, three types of operations, synthesis, interrogation, and modification, are examined with respect to three different types of user interfaces, mouse, direct tablet, and indirect tablet. The study, using undergraduate student participants in an introductory engineering graphics course, demonstrates that the mouse performs the highest across the dimensions of completion time and number of errors. However, the direct tablet, using a pen like device directly on the visualization screen, shows promise.

Sign in / Sign up

Export Citation Format

Share Document