Critical Path for a Grey Interval Project Network

This study aims to analyze the performance of countries in the COVID-19 period. The main motivation of the study is to make a more realistic assessment by taking into account the epidemic information and health system-related features, as well as government precaution (Stringency Index) and economic criteria. In this way, the characteristics of the countries that stand out in the fight against the pandemic were tried to be determined. Within the scope of the study, the CRITIC method, which is widely used and stands out as an objective method, was preferred for weighting the criteria. Country performances were analyzed separately using weighted and unweighted criteria. The Grey Relational Analysis (GRA) method, together with weighted and unweighted criteria, was used to determine country rankings. When the results are examined, it has been observed that the level of economic prosperity and the measures taken against the pandemic has brought countries directly to an advantageous point. Countries with a relatively low level of economic prosperity compared to other countries, unfortunately, ranked lower in the ranking. On the other hand, countries with elderly populations were able to find a place in the lower ranks due to high mortality rates despite their extensive economic opportunities. Although the weighting of the criteria affects the country rankings, there has been no change in the countries in the top two.

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Uncertain Engineering Critical Path Solving Method Based on Interval Number theory

Li¹,

Wang²

2015

Proceedings of the 2015 International Conference on Mechatronics, Electronic, Industrial and Control Engineering

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Critical path management is an important way for controlling the schedule of an engineering project, it always difficult to describe by a precise manner for the uncertain characteristic. In this paper, the interval number is applied to describe the uncertain characteristic, and a preference indexes λ are introduced to solve the critical path on linear programming problem. Meanwhile, the control priorities of sub-path can be also analyzed by a sensitivity coefficient δ. The result shows that compared with traditional probability methods and other interval critical path studies, the proposed method can improve the precision of the project time control. From the example and the result analysis, traditional probability method can deal with the uncertain problem of the network, but it may optimistically estimate the project duration time, namely, the duration time is underestimating. But interval critical path solving method could give more accurate duration time and critical path, and the proposed method could give more exact result and the calculation procedure is simpler.

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Critical Path for a Grey Interval Project Network

Cited by 3 publications

References 6 publications

Complex Projects Management with Interval Grey Numbers

Complex Projects Management with Interval Grey Numbers

Analysis of Economic and Epidemic Performances of Countries During the Covid-19 Pandemic Period

Uncertain Engineering Critical Path Solving Method Based on Interval Number theory

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