So, are there absolutely no non-functional requirements at all? Well, yes, I can think of two at least of any system: cost and time.

To compare neurological and functional outcome and length of stay of persons with traumatic vs non-traumatic spinal cord lesion (SCL) after in-patient rehabilitation.

IT projects can and often will fail to meet defined expectations. Executing a project without set business, functional and non-functional requirements can cause the failure. James Fairhurst ...