Katsuragawa, C M; Lucko, G; Isaac, S and Su, Y (2021) Fuzzy linear and repetitive scheduling for construction projects. Journal of Construction Engineering and Management, 147(3): 04021002, ISSN 0733-9364
Abstract
Unavoidable risks that cause uncertainty within activity durations should be modeled to gain realism in scheduling. While approaches exist for one-dimensional network schedules, two-dimensional linear and repetitive schedules that track both work and time lack such a method. Fuzzy logic can express variability by modeling optimistic, realistic, and pessimistic cases, which, in this study, form a cone of expected activity durations. Previous studies attempted to apply it to linear and repetitive schedules but suffered from inconsistencies that rendered their results incorrect. Therefore, this research proposes a new fuzzy scheduling method. Its contribution is threefold. First, it models linear or segmental activities as continuous yet flexible fuzzy cones. Second, it explicitly expresses continuous buffers in both the time and work/space dimensions to compose an efficient schedule from such inputs. Third, it identifies their full or partial fuzzy criticality and fuzzy float so that managers can split their attention accordingly. It is illustrated by a validation example, which also explains prior inconsistencies. The industry thus gains a new method that considers uncertainty to generate stable and efficient schedules.
| Item Type: | Article |
|---|---|
| Index terms: | construction project, validation, manager, repetitive scheduling, scheduling, dimension, realism, duration, modelling, variability, buffer, fuzzy logic |
| Subjects: | project controls, statistical analysis, education and knowledge transfer, financial risk, professional development, production management, operations research, health monitoring assessment and metrics, analytical methods, data science, practitioner |
| Topics: | Time Control, Digital Applications, Roles and Professions, Cost Management, Health and Safety, Project Management, Research Practice, Information Management, Engineering Principles |
| Descriptive scope: | 4 PCTA |
N.B. Descriptive scope is a count of how many of the five facets of empirical research are indicated by the words used in title, abstract and keywords. It is not intended as a judgement on the research; merely a count of the kind of word we would expect to indicate Phenomenon, Concepts, Theoretical framing, Empirical techniques, Analytical techniques. If all five are present, then a code of “5 PCTEA” will indicate this. If you feel the coding for this record is questionable, we welcome discussion around the terms we matched or the way we categorized them. The facet you would expect may not be coded, or a facet may be coded inappropriately. This can also bear on a larger question, of which facets should be treated as defining in construction management research. Please get in touch, and we will look at it. More details here