P2

Question 0

What are activity samplings?

Answer 0

Techniques used to evaluate the efficiency of labor utilization and the management

Question 1

What are three important aspects of data gathering?

Answer 1

Observation (who, what, where, when, how)
Questionnaires
Interviews

Question 2

What are activity samplings based on?

Answer 2

Random observations

Statistical analysis

Question 3

What are three types of common activity samplings in construction productivity?

Answer 3

Field ratings
Productivity ratings
5 minute ratings

Question 4

What does a field rating consist of?

Answer 4

Number of workers on site
Number of workers observed
Number of workers classified as working
Percentage working

Question 5

What are the guidelines for a field rating?

Answer 5

Separate counts (working and total)
Include at least 75% of personnel
Full time counter
Unbiased counting
Avoid transitional periods
Do not discards counts

Question 6

What are the characteristics of a productivity ratings?

Answer 6

By trade or craft documenting the effective, contributory, and not useful workers and calculating the labor utilization factor

Question 7

What is the LUF formula?

Answer 7

LUF = (effective work + k*contributory) / total observed

Question 8

What are the characteristics of a 5 minute rating?

Answer 8

Observing workers on site for a minimum of 5 minutes or 1 minute per worker and documenting if they are being effective or not and documenting any important notes. Then calculating the total man units, the number of effective units, and calculating the effectiveness.