As a part of the ongoing move by many U.S. shipyards to adopt zone-oriented ship production, the need for an accuracy control system has been identified. Recent research has indicated that the accuracy control system can form the basis for performing process analyses as a means of improving productivity. This paper reports the results of Maritime Administration-sponsored research to develop a set of variation-merging equations for a specific vessel construction project. The equations are presented for the stern section (block 6) of the U.S. Navy T-AGOS ocean surveillance vessels under construction at Tacoma Boatbuilding Company. Data collected in 1982 provided process means and standard deviations for the following stages of production: part fabrication, panel line, subassembly and subblock assembly. Based on these data and observed assembly sequences, variation-merging equations are written and analyzed for the assembly of subblocks 602 and 603 and for the assembly of block 6 (that is, joining of 602 and 603). The impact on the merged variation of altering the assembly sequence is also analyzed and reported. The analysis is used to predict rework type (gas cutting or back-strip welding), and probabilities. Although these equations are dependent on the shipyard and the design, the techniques and principles for their development are applicable for any shipyard and any design. As such, they form a case study which makes them suitable as a guide for shipyards undertaking analysis of assembly procedures using variation-merging equations.
Skip Nav Destination
Article navigation
Journal Paper|
May 01 1985
Accuracy Control Variation-Merging Equations: A Case Study of Their Application in U.S. Shipyards
Richard Lee Storch
Richard Lee Storch
University of Washington
Search for other works by this author on:
J Ship Prod 1 (02): 133–144.
Paper Number:
SNAME-JSP-1985-1-2-133
Article history
Published Online:
May 01 1985
Citation
Storch, Richard Lee. "Accuracy Control Variation-Merging Equations: A Case Study of Their Application in U.S. Shipyards." J Ship Prod 1 (1985): 133–144. doi: https://doi.org/10.5957/jsp.1985.1.2.133
Download citation file:
Sign in
Don't already have an account? Register
Personal Account
You could not be signed in. Please check your username and password and try again.
Captcha Validation Error. Please try again.
Pay-Per-View Access
$35.00
Advertisement
8
Views
Cited By
Email Alerts
Advertisement
Suggested Reading
The Use of Computer Simulation of Merged Variation to Predict Rework Levels on Ship's Hull Blocks
J Ship Prod (August,1988)
Accuracy Control for U.S. Shipyards
J Ship Prod (February,1985)
Implementation of Variation Merging Equations for Production Data Collections in Accuracy Control: A Case Study
J Ship Prod (February,1999)
Decentralization—The Management Key to Effective Accuracy Control
J Ship Prod (May,1987)
The Establishment of Shipbuilding Construction Tolerances
J Ship Prod (August,1987)
Advertisement