From what I've read I believe user requirements are just the system requirements given in lay mans terms, is this correct? I'm specifically referring to the book "Software Engineering" by Ian Sommerville which I am obligated to follow. Given the example below from said book, why is there not a user requirement to match the second system requirement. For example "the user requires the report to be generated after 17.30 on the last working day of the month." To me that is still in natural language so it is readable by the user. How much detail should be included in a user requirement vs system requirement and where do you draw the line?
User Requirement Definition:
1. The MHC-PMS shall generate monthly management reports showing the cost of drugs prescribed by each clinic during that month.
System Requirements Specification:
1.1. On the last working day of each month, a summary of the drugs prescribed, their cost, and the prescribing clinics shall be generated. 1.2. The system shall automatically generate the report for printing after 17.30 on the last working day of the month.