Formalization of smallest workface boundary (SWFB) : toward generating and operating level of development (LOD) 400-based daily bill of materials (BOM)
Abstract/Contents
- Abstract
- Level of development (LOD) 400 provides the definitive and fully developed 3D objects at fabrication level of detail and is, therefore, the level appropriate for a foreman to use for managing the construction work at the workface. However, for a foreman, planning a day, updating the work completed, and tracking the daily performance—thereby going through the plan-do-check-act (PDCA) cycle on a daily basis—with LOD400 objects can be time-consuming and onerous, since LOD400 is highly granular and a foreman's priority is not operating digital information in an office environment. This research considers these conditions of a foreman in a field setting and introduces an ontology that allows a foreman to go through the PDCA cycle on a daily basis with LOD400 objects. The key enabling concept is the smallest workface boundary (SWFB), which is a boundary that encapsulates a set of LOD400 objects in the smallest workable unit for a certain trade. With SWFBs, the granularity of the LOD400 objects that a foreman has to interact with can be reduced and a foreman can quickly select the LOD400 objects to be built on a day, generate a LOD400-based daily bill of materials (BOM), and operate the BOM through the PDCA cycle. The concept of a SWFB was incorporated into a software prototype for field experiments. The field experiments with the prototype showed that a foreman can go through the PDCA cycle with LOD400 objects in 2 minutes and 47 seconds per day on average and the qualitative measure of the usability was also high with a usability score (on the System Usability Scale) of 95 on average, which can be interpreted as above excellent. Future research should focus on applying the prototype on a larger scale with interdependent parties, including suppliers, involved and measuring the impact of the prototype on the performance, such as the accuracy of materials ordered and the reason for non-completion due to inaccurate ordering.
Description
| Type of resource | text |
|---|---|
| Form | electronic resource; remote; computer; online resource |
| Extent | 1 online resource. |
| Place | California |
| Place | [Stanford, California] |
| Publisher | [Stanford University] |
| Copyright date | 2019; ©2019 |
| Publication date | 2019; 2019 |
| Issuance | monographic |
| Language | English |
Creators/Contributors
| Author | Song, Min-ho |
|---|---|
| Degree supervisor | Fischer, Martin, 1960 July 11- |
| Thesis advisor | Fischer, Martin, 1960 July 11- |
| Thesis advisor | Khanzode, Atul, 1971- |
| Thesis advisor | Lepech, Michael |
| Degree committee member | Khanzode, Atul, 1971- |
| Degree committee member | Lepech, Michael |
| Associated with | Stanford University, Civil & Environmental Engineering Department. |
Subjects
| Genre | Theses |
|---|---|
| Genre | Text |
Bibliographic information
| Statement of responsibility | Min Ho Song. |
|---|---|
| Note | Submitted to the Civil & Environmental Engineering Department. |
| Thesis | Thesis Ph.D. Stanford University 2019. |
| Location | electronic resource |
Access conditions
- Copyright
- © 2019 by Min Ho Song
- License
- This work is licensed under a Creative Commons Attribution Non Commercial 3.0 Unported license (CC BY-NC).
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