In our survey of over 250 OTs, it takes on average a little over 2 hours to write an evaluation even when using strategies such as templates and cutting and pasting. The percentage of therapists with 2-10 years of experience who take more than 3 hours to write an evaluation is an astounding 40 percent. When therapists use the DTD software program, they are able to do an evaluation on average in about 1.5 hours.