<p>Modality performs different procedures (with different MPPS cases) and communicates those results with the Order Filler. Image Manager also participates and gets ADT events.</p>  <p>We are testing the Modality worklist query. Show the observer that the modality can query the MWL using any combination of the following keys : Patient's Name (0010,0010), Patient ID (0010,0020), Accession Number (0008,0050), Requested Procedure ID (0040,1001)</p>  <p>We are testing the different MPPS cases : In Progress, Completed, Append, Abandonned