title: Proper vocabulary for Test Case
body: <p>I am sorry if this doesn't pertain to a specific programming work but it is closely related to writing testing cases.
  I am in the process of translating IT test cases written in Japanese and I was wondering what are the English equivalent words to describe the following test scenarios.</p>
  
  <p>I can write the descriptions of each types of test cases.
  If I translate them directly, they use the words "Normal" "Semi-normal" "Abnormal"
  to describe the kind of test cases they write.</p>
  
  <p>Normal : this indicates cases that test for operations that occurs during daily business transactions</p>
  
  <p>Semi-normal: indicates cases that test for operations that do not occur during business transactions but can possibly occur ex) input overflow</p>
  
  <p>Abnormal: cases that test for operations that can only occur if something "abnormal" is done or happens ex) time out due to network being down, disk write overflow due to full capacity</p>
  
  <p>Are there words to describe the 3 terms above?</p>
  
  <p>Thank you for your help.</p>