How do you fire someone when you discover that they lack the skills needed for the job. The issue i'm having pertains to critical thinking and analysis skills both of which are tough to evaluate during a basic interview or even 2 for the same candidate. I have a direct who looks great on paper and interviewed well (soft skills) but i've determined over their first year on the job that they simply lack the inate ability to solve even moderatetly complex problems without continuous hand holding or involvement by other team members. I have had several feedback conversations with this person about being more detail oriented and focused but i'm convinced that they just are not a good match. At this point I shy away from assigning them projects since our clients are demanding and unforgiving. However whenever i speak to HR about what to do they direct me to documenting missed deadlines and\or negative customer feedback as a measure. Can't I just say to this person "it's just not working out" or " "you should start looking for a new job"?