  Case Management has been gradually evolving to support Knowledge-intensive
business process management, which resulted in developing different modeling
languages, e.g., Declare, Dynamic Condition Response (DCR), and Case Management
Model and Notation (CMMN). A language will die if users do not accept and use
it in practice - similar to extinct human languages. Thus, it is important to
evaluate how users perceive languages to determine if there is a need for
improvement. Although some studies have investigated how the process designers
perceived Declare and DCR, there is a lack of research on how they perceive
CMMN. Therefore, this study investigates how the process designers perceive the
usefulness and ease of use of CMMN and DCR based on the Technology Acceptance
Model. DCR is included to enable comparing the study result with previous ones.
The study is performed by educating master level students with these languages
over eight weeks by giving feedback on their assignments to reduce perceptions
biases. The students' perceptions are collected through questionnaires before
and after sending feedback on their final practice in the exam. Thus, the
result shows how the perception of participants can change by receiving
feedback - despite being well trained. The reliability of responses is tested
using Cronbach's alpha, and the result indicates that both languages have an
acceptable level for both perceived usefulness and ease of use.
