This one's a real world scenario for a friend of mine who owns a recruiting business.  My advice was to return to basics and do a ratios/metrics "where are we now" to identify what's missing.  Good time of year to have a next year planning session too.

Steve Finkel has some invaluable advice on using metrics to diagnose your desk. 

But first I recommended that they check in to see what's going on personally for that person that might be at play.  

Any other thoughts?