He failed to take into account the amount of energy he would use up at his appointment which would impact on what his client could do for the rest of the day.

He made her appointment time to suit him and not her

He failed to think about the high cost of physiotherapy which would leave a lack of money for the other types of therapy his client needed.

He failed to take into account the amount of time his client needed to get dressed and ready for his appointment-resulting in them having to get up really early.