Congress faces another deadline to pass government funding on Jan. 19. That’s when the latest of three stop-gap funding measures expires. For years, Congress has relied on what are called continuing resolutions to prevent government shutdowns when the parties can’t agree on full appropriations bills, and fiscal year 2018 is no different. A continuing resolution basically keeps government agencies funded at the same level as the previous year, even if the needs of a given agency have changed.

“They’re also limited in kind of new types of accounts or things like that,” said Marc Goldwein of the Committee for a Responsible Federal Budget. “They can’t go forward with new initiatives but more importantly they have no certainty about how much money they’re going to have.”

Bill Hoagland of Bipartisan Policy Center said a continuing resolution can also spur waste, since, “you also are not able to reduce and eliminate those programs that have run their lifetime … so the real cost of a continuing resolution creates inefficiencies in the way federal government should operate,” he said.

That can be an inconvenience if there’s only a short gap between a continuing resolution and a final bill, but when it stretches into multiple continuing resolutions over months, Hoagland said it’s a “management nightmare.”

That can be a particular issue for the military, said Todd Harrison at the Center for Strategic and International Studies. He said maintenance of ships and other long-term planning can be delayed when appropriations bills are not passed in a timely manner.

“The Department of Defense, and many other government agencies as well, have been operating under continuing resolutions for more than one third of the time for the past nine years,” he said, “and that is highly unusual.”

According to a report from Bloomberg Government, more than 70 Pentagon programs are likely on hold as a result of the short-term funding.