"long timeline" is correct and usable in written English.
It is often used to refer to a plan or process that will take a significant amount of time. For example, "We plan to complete the project by the end of the year, but it's going to be a long timeline."
Randall's book covers a long timeline, from slave songs through the nineteen-sixties.
At the V&A we seek to show these interactions in the galleries by interweaving many objects of different types (and from different cultures) across a long timeline.
Located in a grand space once occupied by the Bank of New York, it features a long timeline charting major market events.
Even if Mr. Obama (or his successor, given the plan's long timeline) cannot persuade Congress to change the rules for awarding federal aid by 2018, his administration can still collect and publish the data on college outcomes.
The bigger question is whether all the pieces of the giant project will move forward given the long timeline, the astronomical bill and the political maneuvering over the treaty's approval.
"So being able to project across a very long timeline while still being focused on the immediate tug and pull of politics I think is a useful lesson, and an accurate portrayal of how I think about my work day to day".
Long timelines lead to gaps in coverage, decreased abilities to insert new technologies, attrition in the workforce and a dwindling supply chain".
But oil companies work on the long timelines of research scientists, and Lukoil wants to try and protect its contract now.
Today, there is little political appetite for the risk, cost and especially the long timelines required by counterinsurgency doctrine, which involves building societies and governments to gradually take over the battle against insurgents and terrorists within their borders.
But it's important, too, to remember that, even if the judging is entirely unbiased, the one-hour show is cut from many, many hours of footage, from several angles and over long timelines.
TURKMENISTAN 6. (C) When asked about the possibility of GOTX gas being supplied to GOT, BP repeated its opinion that due to the long timelines involved with gas development, there would be no GOTX gas coming west earlier than 2020.
