earlier this month - were sent to the principals of Ayrshire College, Fife College, Glasgow Clyde College, Glasgow Kelvin College, North East Scotland College and West College Scotland, all of which were created through mergers last year.
They also confirm that harmonising pay and conditions and bringing together different groups of staff remain challenging and are causing concern among employees.
At Glasgow Clyde College, for example, "many staff acknowledged that difficulties related to achieving alignment of terms and conditions had impacted on finalising staff structure, which has, in turn, affected the merger process". According to the chair of the board, the alignment of terms and conditions was "the number one risk to the success of the merger".
And at North East Scotland College, there was "a perception in Fraserburgh that the new management structure was set up to accommodate Aberdeen College staff and that very few Banff and Buchan College staff got senior positions in the new college".
The legacy of the former institutions was highlighted as another issue that had slowed progress in a number of regions. In Fife, both the senior management team and the board of management felt "they have been hindered by the legacy issues and frustrated by the resulting slower than planned pace of change".
Legacy issues were also a concern for Glasgow Kelvin College, which was confronted with a "poorer than expected inherited financial position", while losing the identity of the former James Watt College had proved challenging for West College Scotland in its first six months of operation.
However, progress and a number of positive observations were also noted across Scotland. The learning experience of students at various institutions had barely been affected by the mergers because of the commitment of college staff, the SFC stressed.
At West College Scotland, for example, the courses offered were "rationalised without reducing provision". The report adds: "There are clearer course options for students, as well as clearer progression routes and better employment links."
It was also noted that the mergers would deliver financial efficiencies, which was one of the reasons for the government's drive to establish larger, regional colleges.
Effective leadership and governance were complimented, with the SFC noting that former employees of Adam Smith College in Fife were "impressed" by their new principal and senior management team.
Shona Struthers, chief executive of Colleges Scotland, said that merging two or three organisations was "a complex process". She added: "Having gone through these significant structural changes, we are now focusing on securing additional funding for the sector so that our member colleges can deliver their Wood Commission commitments for the benefit of learners and the wider economy of Scotland."
A spokesperson for the Scottish Funding Council said: "These mergers are going well. Six months after the mergers actually took effect is early in the implementation. Colleges have not fully completed their restructuring and sometimes won't have bedded in new systems - these are the things we will want to see completed well by the time we do the full evaluations two years after merger."