Trans RINA, Vol 156, Part C1, Intl J Marine Design, Jan - Dec 2014
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Electrical services and routing and the speed and accessibility of fit
Simulation of stress points fatigue and general wear points in high traffic areas
Integrity of all fittings in crash as per level 3 requirements of HSC
• Line of sight calculations to ensure that all human size ranges have clear vision.
• Outputs to the customers will be in previous formats mentioned.
At this stage the model needs to have the BOM exploded with a full of analysis and any deviation due to the specification needs to be communicated to the customer with a process of exploring cost options.
saving
5.6(a) Instantaneous labour time and costing from BOM
The benefit of using modular parts and fixing methods is
that they can be defined by time and motion
synthetics. This being the case each part in the BOM can be simulated not only for machine production time but also fitting time. For example; The BOM once exploded might show that there are 200 standard M8 bolts used for holding on, for arguments sake, ceiling and roof panels. The process would be drilling a hole, placing a nutsert and then screwing up the bolt. The time for the operation multiplied by the number of operations plus relaxation allowance will give the overall time. An extension to the BOM can include this detail and a labour rate chosen by the boat builder. The net result is a total time and cost. This synthetic time can consequently be bench marked against the actual fitting time. Any deviation requires a feedback loop and investigation of more productive tools for incremental continuous improvement. There is also the psychological effect on productivity in that if a fit time is quantified then it is generally met. There have been several studies undertaken to verify this in production systems.
6. DETAILED DRAWINGS STEP 6
One of the major delays in most boat yards is caused when fitters are working away from drawing or have very
basic drawings or have no drawings at all.
Detailed drawings must be produced for each stage of the fit. This will cover vessel structure , dimensions and fixing methods , mouldings,
panel numbers seal
positions and adhesives to name a few. The detail level must be designed so that customers own Fitters can install the system quickly and efficiently.
With the initial work undertaken on the design model CAD systems are very efficient at producing detailed drawings and have auto functions for
features and BOM’s. The designer can include details to eliminate confusion at build reducing the decision making time.
dimensions,
cost control and build time accuracy. Customer will be kept informed of any changes.. Also a project plan will be developed against the customers and the stage payment requirements.
Figure 6. Detailed drawings KPM courtesy AMC
Figure 5.6(a) KPM modular interior courtesy Workships NL
The budgets and any design changes requested by the customer will be assessed against the budget to ensure
©2014: The Royal Institution of Naval Architects
6.1 DETAILED BOM AND EXPLODED VIEW One of the most useful documents is the detailed BOM and exploded view which allows the fitter to manifest all parts, which if missing would cause delays. All this information will also help in Class submissions, all material specs and certification will also be logged with the document
allowing full revision control. As
described in earlier sections the BOM can be exploded to ensure that costs and labour are under full control.
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