WHAT ARE THE THEORETICAL STAGES OF SHIPBUILDING
Because complex ships are typically one-off orders built in very short series, a significant amount of engineering work must be performed for each new project. It is important to recognize that even throughout these engineering or even acquisition stages the planning is already setup and refined with more detail. Such as the master document list to account for specific timelines and steps that together complete the required documents and input. For this paragraph input and text is used from Rose, C. (2017). Atomatic production planning for the construction of complex ships.
Section building plan
After the Erection Plan is completed, the shipyard creates the Section Building Plan. This generally occurs at the start of work instruction design. This plan indicates when each section should be assembled and pre-outfitted. The Section Building Plan is generated by extrapolating backwards from the Erection Plan to ensure that each section is ready to be erected on time. The number of sections that can be built simultaneously is limited by the floor area of the section building hall. Whenever the section building requirements of a shipyard exceed its own capacity, the production of entire sections is outsourced. It is also common for shipyards to only consider pre-outfitting on a rudimentary level when creating the Section Building Plan. For example, each section may be assigned two weeks for pre-outfitting regardless of the required outfitting work. For each section the pre-outfitting process is given some overlap with the section assembly process (usually around one week). This allows for the installation of components which are easier to mount before the entire section is fully assembled, such as double bottom pipes. The inputs and outputs of the Section Building Plan are shown in the figure.
The daily operations at a shipyard are recognized through their intense dynamic. As the initial objective of the plan is to mitigate risks the proposed plan should be kept up to date by aligning the various perspectives from all the project participants at the shipyard. This translates into a IT-infrastructure that resembles this average example.
Outfitting plan
A detailed Outfitting Plan on the component level is not created by the shipyard. Instead, the shipyard uses the Section Building Plan to indicate to the subcontractors when each section is available for pre-outfitting. The Erection Plan also contains the time period available for slipway outfitting. Similarly, the painting schedule indicates the latest point in time hotwork can be performed in a space. Subcontractors independently maintain their own schedules. A weekly meeting is conducted with representation from each of the outfitting subcontractors and the shipyard. During these meetings, the subcontractors and shipyard determine what outfitting will be performed during the upcoming week, resolve conflicts between subcontractors, and make minor adjustments to the Section Building Plan
Towards an integrated plan for the shipyard as a whole
Through understated figure it becomes apparent how the various input on the shipyard characteristics, the product hierarchy of the ship and the project timelines are all impacting the setup and contents of the plan.
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