英语翻译Currently,the problem is solved manually by executing a

英语翻译
Currently,the problem is solved manually by executing a trial-and-error process
with the aid of a proprietary simulator that checks whether some simple
physical constraints are being satisfied.This process is very time consuming
and,not rarely,the final results still violate some of the more complex restrictions.
Clearly,this manual process is far from optimal and limits the efficiency
of the network operation.In fact,it is common for the company to use trucks for
transporting pending volumes,thus increasing the overall transportation costs,a
situation that could be avoided by a more intelligent use of the pipeline network.
Due to its size and complexity,as well as to its financial impact,the efficient
operation of this large oil pipeline network is one of the most strategic problems
faced by logistics at petrobras today.As will be discussed later,CP was at the core of a computational model devised and used to find good operational
solutions for real problem instances,in an adequate amount of computer time.