The phrase "although it was decided" is correct and usable in written English.
It can be used to introduce a contrast or exception to a decision that has been made.
Example: "Although it was decided to proceed with the project, many team members still had reservations about its feasibility."
Alternatives: "even though it was determined" or "despite the decision made".
Although it was decided against it at the time, due to the experimental nature of the software, the learning materials could have been decoupled from the simulator and analytics collected on the server side via a Tin-Can API (Kelly & Thorn, 2013).
The force would be based upon the five divisions of the old AIF, although it was decided to limit the overall number of units.
In 1988, the parliament decided to close many Norwegian lines, including the Numedal Line, although it was decided that the section from Kongsberg to Rollag was to be kept for freight traffic.
Although it was decided he has a sister, a wife and a daughter, Meyer's personal life is rarely mentioned on screen, enabling viewers to perceive him as a strong man onto whom they can "project whatever they want from their own imagination".
Although it was decided a priori that geography is an important covariate, the data did not support such an analysis.
Although it was decided to continue the treatment of all other teeth with internal resorption after the main complaints associated with #46 is over, the patient did not attend her subsequent appointments.
Although Bert is in prison ("It was decided that I should be put out of society," he says. "I'm supposed to have killed a girl"), the only crime to which he confesses is the crime of being old, redundant and ridiculous.
After some discussion it was decided that, although the reflection theory held some merit, the overall dearth of information relating to the event rendered a meaningful finding impossible.
In 2006 it was decided that although some IRS employees historically devoted themselves to tax collection, it would be more consonant with George Bush's idea of non-government, if that task were turned over to private collection agencies.
Early on, it was decided that, although funding for hazardous waste research was appropriated to the U.S. EPA, the research program would be administered by the National Institutes of Health (NIH) and conducted in the nation's leading research universities.
Although it was recently decided that bioactive substances will not be included in the 2015 version of the DRIs, the need to establish DRIs for bioactive substances was raised.
