國立虎尾科技大學 |

An Investigation of Mura and Muda in Large Aerospace Development Projects.

Record Type:	Language materials, manuscript : Monograph/item
Title/Author:	An Investigation of Mura and Muda in Large Aerospace Development Projects./
Author:	Harnisch, Erik Olaf.
Description:	1 online resource (118 pages)
Notes:	Source: Dissertation Abstracts International, Volume: 79-08(E), Section: B.
Contained By:	Dissertation Abstracts International79-08B(E).
Subject:	Engineering. -
Online resource:	click for full text (PQDT)
ISBN:	9780355828313

An Investigation of Mura and Muda in Large Aerospace Development Projects.
Harnisch, Erik Olaf.

An Investigation of Mura and Muda in Large Aerospace Development Projects. - 1 online resource (118 pages)

Source: Dissertation Abstracts International, Volume: 79-08(E), Section: B.

Thesis (D.Engr.)--The George Washington University, 2018.

Includes bibliographical references

The elimination of waste is essential to efficient production in any industry. While the concept of Lean has been examined in tandem with engineering and aerospace projects, Lean's foundation in manufacturing has limited much of the related research to that particular industry; scholars had yet to examine the release of engineering drawings for large aerospace development projects from a Lean perspective. This study consisted of two phases aimed at exploring the effects of unevenness in workflow and program organization on the rates revisions required for engineering drawings leading up to CDR. Data were obtained for two large aerospace divisions consisting of three programs and a total of 20 unique builds for a project. The researcher hypothesized that mura, defined as changes in the number of monthly engineering drawings released, was associated with muda , defined as an increase in the likelihood that drawings would require revision. The controlled variables included product type (satellite or launch vehicle) and the customer, which resulted in similarities in management and reporting styles for the two divisions included. The independent variable for Phase 1 was the number of drawings released per month, while the dependent variable was the number of drawings that required subsequent revision. For Phase 2, the dependent variable was the number of revisions per drawing. Analysis for Phase 1 indicated that no significant relationship existed between the number of drawings released per month and the likelihood that a drawing would require revision. Because findings for the first research question were surprising, the researcher expanded the study. The second phase of the study aimed at investigating the possible ways that differences in division organization might contribute to differences in revision rates. The analysis for Phase 2 indicated a statistically significant difference existed in the average revision count between Division 1 and Division 2. Implications of these findings are discussed.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2018

Mode of access: World Wide Web

ISBN: 9780355828313Subjects--Topical Terms:

561152
Engineering.
Index Terms--Genre/Form:

554714
Electronic books.

An Investigation of Mura and Muda in Large Aerospace Development Projects.
LDR:03272ntm a2200337Ki 4500 001 917874
005 20181022132249.5
006 m o u
007 cr mn||||a|a||
008 190606s2018 xx obm 000 0 eng d
020 $a 9780355828313
035 $a (MiAaPQ)AAI10785048
035 $a (MiAaPQ)gwu:14110
035 $a AAI10785048
040 $a MiAaPQ $b eng $c MiAaPQ $d NTU
100 1 $a Harnisch, Erik Olaf. $3 1192061
245 1 3 $a An Investigation of Mura and Muda in Large Aerospace Development Projects.
264 0 $c 2018
300 $a 1 online resource (118 pages)
336 $a text $b txt $2 rdacontent
337 $a computer $b c $2 rdamedia
338 $a online resource $b cr $2 rdacarrier
500 $a Source: Dissertation Abstracts International, Volume: 79-08(E), Section: B.
500 $a Adviser: Muhammad F. Islam.
502 $a Thesis (D.Engr.)--The George Washington University, 2018.
504 $a Includes bibliographical references
520 $a The elimination of waste is essential to efficient production in any industry. While the concept of Lean has been examined in tandem with engineering and aerospace projects, Lean's foundation in manufacturing has limited much of the related research to that particular industry; scholars had yet to examine the release of engineering drawings for large aerospace development projects from a Lean perspective. This study consisted of two phases aimed at exploring the effects of unevenness in workflow and program organization on the rates revisions required for engineering drawings leading up to CDR. Data were obtained for two large aerospace divisions consisting of three programs and a total of 20 unique builds for a project. The researcher hypothesized that mura, defined as changes in the number of monthly engineering drawings released, was associated with muda , defined as an increase in the likelihood that drawings would require revision. The controlled variables included product type (satellite or launch vehicle) and the customer, which resulted in similarities in management and reporting styles for the two divisions included. The independent variable for Phase 1 was the number of drawings released per month, while the dependent variable was the number of drawings that required subsequent revision. For Phase 2, the dependent variable was the number of revisions per drawing. Analysis for Phase 1 indicated that no significant relationship existed between the number of drawings released per month and the likelihood that a drawing would require revision. Because findings for the first research question were surprising, the researcher expanded the study. The second phase of the study aimed at investigating the possible ways that differences in division organization might contribute to differences in revision rates. The analysis for Phase 2 indicated a statistically significant difference existed in the average revision count between Division 1 and Division 2. Implications of these findings are discussed.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2018
538 $a Mode of access: World Wide Web
650 4 $a Engineering. $3 561152
650 4 $a Operations research. $3 573517
655 7 $a Electronic books. $2 local $3 554714
690 $a 0537
690 $a 0796
710 2 $a ProQuest Information and Learning Co. $3 1178819
710 2 $a The George Washington University. $b Engineering Management. $3 1179162
773 0 $t Dissertation Abstracts International $g 79-08B(E).
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10785048 $z click for full text (PQDT)