1.2 Time data collection
Time and motion data were captured with an electronic stop-watch using the continuous stop-watch reading method [5, 8]. In the continuous method, the stop watch was allowed to tick continuously and at the end of each element of operation (motion or activity) reading of the stop watch was made and recorded in a time study register. The time required for each particular element of the operation, the previous reading (i.e. before stepping into that activity) was subtracted from the next reading (i.e. reading at point of stepping out of that activity).