TABLE OF CONTENTS Finally, the study analyzes work activity and time itself.
Figure H.5, Wrench Time Categories by Hour, demonstrates the variance by hour. Category 1, Working, is between 40 and 53% during periods away from day start, day end, lunch, and traditional break times. However, it drops to between 23 and 33% around breaks or lunch. It drops further to 18.84% for the first hour of each day and only 3.95% for the last hour of each day.
The category which most varies (indirectly) with wrench time is Category 19, Break. The morning break consumes 42.03% of the hour between 9:30 and 10:30 (25 minutes) and the afternoon break 33.33% (20 minutes) between 3:00 and 4:00 without even considering associated travel. Similarly, lunch time accounts for 18.87% (11 minutes) of the half hour before noon and the half hour after 12:30 without considering associated travel or the half-hour lunch period itself.
Category 2, Travel, is highest in the first period of the day at 26.09%. So, on the average, 16 minutes is taken by each person just in traveling before job site work begins. Appendix E, Classification of Comments by Hour, shows that this travel is split among getting parts, getting tools, and actually going to the job site. Travel is lowest for the last period of the day (5.26%, 3 minutes). Travel near break time and lunch time appears higher than other times with the exception of the 1:00 to 2:00 PM period. It is noteworthy that the 1:00 to 2:00 period has the highest wrench time, but also the second...
