Seekers get a thorough and objective assessment of how their illness or disability affects their ability to carry out the activities in the Personal Capability Assessment.
The threshold set by the PCA which determines the medical grounds for benefit entitlement, is designed to reflect the point at which a person's ability to perform physical and mental activities is substantially reduced to a point where they should not be required to seek work as a condition of benefit, rather than the point at which work becomes impossible.
A medical professional will assess how well she can do things like walk, sit and stand up. They will complete a medical report and send it to the office dealing with the claim to help them decide if she is not able to work and if she will qualify for Incapacity Benefit.
Whilst she may not be able to do certain jobs, she may be able to do others, but the assessment should determine whether she will be required to seek (that) work whilst receiving benefits.