Interesting case. I would consider to divide the 200,000 tons in truckloads of each 17 tons /truck, say 12000 truckloads. Then I would divide the truckloads in batches and use cascading scheduling techniques to level the resources. Drivers and trucks.
I would opt for substations ( parking end rest places) along the 1500 km road. Use these substations as buffer stations to supply the correct materials at the ROS ( Required On Site) dates to match the construction activities.
So you have difficult and good road conditions and you can estimate the duration of the rides. These are different and they are reasonable easy to predict and trucks could be different for the easy and difficult road conditions.
Use incentives and/or LD’s for the road completion up to the substations.
Trust this helps
Johannes
Member for
24 years 9 months
Member for24 years9 months
Submitted by Vladimir Liberzon on Fri, 2015-03-20 18:30
I don't know how trucks could help. If to model increasing supply of materials project may accelerate because more activities requiring these materials could be done in parallel. But what will change if more trucks will be used?
Member for
16 years 7 months
Member for16 years7 months
Submitted by Gary Whitehead on Fri, 2015-03-20 17:58
Gary, yes, Spider has the solution but it is natural to model limited material supply applying material leveling that does not exist in P6. What do you mean by delivry resources?
Member for
19 years 10 monthsHi GaryI would seperate the
Hi Gary
I would seperate the two contracts.
The Contrcator B road is presumably going to become the main access to the project so it would deteriorate quickly with heavy truck usage.
Both contractors would be disrupted and the likelyhood of cross claims would be high.
I would suggest that Contractor A install his own temporary haul route using laterite / gatch topping that can be readily maintained.
This would cost circa $10 mil - get a price to check it.
Temporary bridge crossings for the rivers at say $50k each.
You can then set a constant haul / delivery rate for the first 24 months of Contract A work and an improvement thereafter.
Penalties could be applied to Contractor B if he does not deliver.
It would also eliminate the inevitable contingency that both contractors will build into their price and programme.
Use calendars for the rainyy season stoppages.
Best regards
Mike Testro
Member for
15 years 9 monthsHi GaryInteresting case. I
Hi Gary
Interesting case. I would consider to divide the 200,000 tons in truckloads of each 17 tons /truck, say 12000 truckloads. Then I would divide the truckloads in batches and use cascading scheduling techniques to level the resources. Drivers and trucks.
I would opt for substations ( parking end rest places) along the 1500 km road. Use these substations as buffer stations to supply the correct materials at the ROS ( Required On Site) dates to match the construction activities.
So you have difficult and good road conditions and you can estimate the duration of the rides. These are different and they are reasonable easy to predict and trucks could be different for the easy and difficult road conditions.
Use incentives and/or LD’s for the road completion up to the substations.
Trust this helps
Johannes
Member for
24 years 9 monthsI don't know how trucks could
I don't know how trucks could help. If to model increasing supply of materials project may accelerate because more activities requiring these materials could be done in parallel. But what will change if more trucks will be used?
Member for
16 years 7 monthsI suspected as much! By
I suspected as much!
By delivery resources, i meant trucks / drivers
Member for
24 years 9 monthsGary, yes, Spider has the
Gary, yes, Spider has the solution but it is natural to model limited material supply applying material leveling that does not exist in P6. What do you mean by delivry resources?