Master data contains the basic characteristics of a panelist as specified by the panel administrator. It is stored independently from projects and is permanently available, e.g. for evaluation purposes or for creating subpanels (“groups”).
Before you start
Please mind:
- Up to at most 2,800 master data per installation can be created.
- The maximum number of master data which are available on a specific installation depends on various factors, as e.g. type and size of the master data created, the content stored in them and the number of characteristics. The maximum number of available master data may be lower than 2,800.
- In particular, it is recommended to use not more than 300 master data of type “Text”, and to carefully select the smallest possible size range for these. Text variables need considerably more storage space than other types. Therefore, if you use more text variables, both the available storage space and the maximum number of variables which can be created will get smaller.
- The number of master data affects the performance of the panel. The higher the numbers, the slower the panel installation will be. If any master data are not needed anymore, make sure to export and store the values contained therein and then delete the redundant variables.
- The consistency of master data is of fundamental importance for your panel. Therefore, only one change process can be executed at a time (e.g. creation of a new master data, change of data type or size, deletion or automated creation in context of master data allocation). If you try to trigger a change while another process is still running (e.g. started by another user), EFS will ask you to repeat the action at a later date.
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