Mike,

Better double chek it is not a a 7-inch 45 rpm Tom Jones record.

I know Tom Jones was a British singer of the 70’s but we never watched the show. It was shown at the same hour a local singer was on TV. My mother always wanted to see the show but at home we practiced democracy where majority rules. My one years old younger brother would say, Mom, the only word he knew. My father would say local talent and so do I, we always won by the count of 3 to 1.

Best regards,
Rafael

Mike,

Very good point, your scientific approach is the correct. Production rates are not fixed.

Even when new scrapers are faster than the older they are somewhat limited, in adittion to the fact new trucks and backhoes are becoming also more efficient. We use them frequently here as our landscape is 75% mountains, on our road design and construction we accommodate for minimum hauling distances, grade-ability becomes a major concern even when empty up the hill.

Good production references should provide you with different scenarios and combination of equipment as to simplify your preliminary estimate. That is why I advocate for references that provide you with the details; usually a brief description of the operation and the crew that includes equipment will do it. This is what is missing at the production rates shown in PP, if neither crew nor methods are provided production can be anything.

Gobinath question is in order, he cannot deppend on production rates as shown in PP.

Best regard,
Rafael

Dear Gobinath,

I would also recommend that you check the type and size of machine that you will have on site. This is a Major Factor in determining the productivity rates.

Generally, the bigger the machines, the higher the productivity rates depending on the type of site layout you have.

With kind regards,

Samer