Cowford- Excellant explanation of what railroad management and marketing folks are looking at in their evaluation of whether a particular move or aggregated business by customer, lane, commodity, industry, etc. etc. contributes to fixed costs. Of course, railroad costing is an art to a degree, and generation of "good" costing information is an important challenge. In instances where traffic requires close scrutiny, a range of costs can be utilized: total cost (includes fixed costs); long-term variable (your example); modified long-term variable (essentially the "direct" costs to add the business under scrutiny); and, the specificity of a cost study for the particular traffic, infrastucture, line-of-business, etc. in question.
In a general sense, railroad profitability increases with higher revenues tied to higher volume, higher weight, longer distances and "ease of handling" (ie., damage, number of sales contacts, etc.) and/or lower costs with minimized switching, higher crew and power utilization and productivity, higher equipment productivity and/or utilization and maximizing the utilization of train capacity (like hitch utilization in intermodal). All of this within the demands and economics of the marketplace, the flows of freight for various equipment and the variances in volumes day-to-day, week-to-week, and month-to-month. Who could ever claim that the commercial side of railroading isn't interesting?
An example of how a line-of-business has been managed to profitabilty would be the shifting of domestic merchandise traffic moving in railroad-owned intermodal equipment from the midwest to east coast markets with a haul of 700-800 (competitive highway) miles earning a 1.0 ratio into domestic doublestack containers owned by private parties stacked in high-clearance doublestack lanes for somewhere around a 1.5 ratio. While revenues declined to account for the private containers, equipment ownership costs shifted away from the railroads and train capacity greatly increased, reducing costs to a much larger degree . Such an improvement takes a line-of-business from close to breakeven and not worth re-investment as equipment wears out, etc., to a healthy contribution that attracts the capital of re-/investment in the business. And, of course, there are all kinds of examples post WWII, and especially since deregulation, where railroads have acted to improve their profitability through network, equipment, operations, and marketing levers.
In a general sense, railroad profitability increases with higher revenues tied to higher volume, higher weight, longer distances and "ease of handling" (ie., damage, number of sales contacts, etc.) and/or lower costs with minimized switching, higher crew and power utilization and productivity, higher equipment productivity and/or utilization and maximizing the utilization of train capacity (like hitch utilization in intermodal). All of this within the demands and economics of the marketplace, the flows of freight for various equipment and the variances in volumes day-to-day, week-to-week, and month-to-month. Who could ever claim that the commercial side of railroading isn't interesting?
An example of how a line-of-business has been managed to profitabilty would be the shifting of domestic merchandise traffic moving in railroad-owned intermodal equipment from the midwest to east coast markets with a haul of 700-800 (competitive highway) miles earning a 1.0 ratio into domestic doublestack containers owned by private parties stacked in high-clearance doublestack lanes for somewhere around a 1.5 ratio. While revenues declined to account for the private containers, equipment ownership costs shifted away from the railroads and train capacity greatly increased, reducing costs to a much larger degree . Such an improvement takes a line-of-business from close to breakeven and not worth re-investment as equipment wears out, etc., to a healthy contribution that attracts the capital of re-/investment in the business. And, of course, there are all kinds of examples post WWII, and especially since deregulation, where railroads have acted to improve their profitability through network, equipment, operations, and marketing levers.