(i) One person using a hammer will take five days to nail new shingles on the roof of a 300 m2 house.
(ii) Two persons using a hammer but working together (one holds a shingle, the other swings the hammer) will take two days to do the same job.
(iii) One person using a nail gun will take one day to do the same job.
a. Define a labour productivity' measure and determine its value for each of the above cases.
b. Calculate the percentage increase in productivity due to method improvement, i.e., from (i) to (ii).
c. Calculate the percentage increase in productivity due to using technology, i.e., from (i) to (iii).