<qa>  What was the time to fill in conventional, simulated and CPOE forms?Methods: Setting: An 18-bed PCCD in a tertiary-care childrens hospital. Design: Prospective cohort study. Measures: Compilation and comparison of number of errors and time to fill in forms before and after implementation of CPOECDSS. Errors were identified by reviewing orders and classified as potential adverse drug events ADEs, medication prescribing errors MPEs, and rule violations RVs. They were compared during the year preceding and following implementation of CPOE CDSS. Simulated forms were also used to further test error occurrence. Time to fill in conventional, simulated and CPOE forms was measured and compared. 