Editing projects in multi-user mode
There are two ways to enable the simultaneous editing of project data within a scenario management project:
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You can pass on parts of the project to third parties and then integrate newly created objects from this partial project into the overall project.
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You can use multi-user mode, i.e. several people can access and work on the same project at the same time. Multi-user operation is subject to certain conditions.
To make parts of the project available to third parties for editing, you can export partial projects, i.e. cut out selected objects from the overall project (User Manual: Exporting a partial project). These partial projects can be edited as independent projects and later be integrated into the overall project. PTV Visum ensures that the newly created objects are integrated properly.
In order to avoid having to load numerous modifications, during partial project export, you can raise modifications for the base version that are always used in the "cut out" part of the project. During the integration process, the merging of these modifications will be taken into account.
Should you later wish to integrate the partial project into the overall project once again, do not change the base version, the exported modifications or the modifications integrated into the base version of the partial project. During the "Export partial project" process, you can lock these objects in the overall project to ensure trouble-free integration. In addition, you may also lock objects in the exported partial project to avoid unintended changes to the base data.
In multi-user mode, you can split up the creation of modifications among several people, especially for large projects. The prerequisite is that the project database of the scenario management is administered in SQL server (User Manual: Creating a project for scenario management). The modifications edited by several users are then locked for editing by other users. This also applies to modifications or scenarios depending on the modifications used. The Multi-user mode tab provides an overview of all locked objects and signed in users. The depicted approach ensures that scenarios and modifications are kept consistent. With the conversion functions provided, you can convert your project back to a standard SQLite database without multi-user mode at any time.
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Note: If several users prepare model transfer files externally, you may use the same keys for new network objects, even though they have different meanings in terms of content. PTV Visum will recognize these key conflicts when you use the model transfer files in scenario management. So, if the same key has been assigned twice, one of the objects is automatically assigned a new, unique key. |

