The fact that a Well Assembly is actually installed in the Facility that is a Well is shown in Figure 21-9. Here, each Well Assembly must be placed via exactly one Installation into a Well. Since Well Assembly Placement is a sub-type of Material Movement, it implies the action of doing the Installation. Note that in the case of an Installation it must be into one Facility, but there is no reference to its being from another Facility. As with any Material Movement, it takes place at a particular Beginning Date and Time and an optional Ending Date and Time describing the elapsed time of the installation process. This implies that at some time there may also be a Removal of the Well Assembly as well. This is a different ...

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