Glamorgan chairman Paul Russell has given his personal backing to director of cricket Matthew Maynard but admits his position could be under pressure.
Asked if Maynard's job is safe, Russell told the Sport Wales programme a review of Glamorgan's poor season is imminent.
"You're as good as your last set of results," Russell said.
"The results have been enormously disappointing and that's what Matthew and I, and [chief executive] Alan Hamer will be discussing in some detail."
BBC Sport Wales has asked Maynard to respond to Russell's comments.
Despite a crop of promising home-grown players - such as Maynard's own son Tom, Gareth Rees, James Harris and Ben Wright - and some astute recruiting, Glamorgan have endured another lacklustre season.
I have faith in Matthew [Maynard] as an extremely talented coach and I am content - for the moment - to rely upon his judgement
Glamorgan chairman Paul Russell
That on-field disappointment contrasts sharply with the Welsh county's off-field progress, with the new Swalec Stadium delivering a first Ashes Test and annual profits being made.
"We will be conducting a root and branch review during October to understand why that potential is not being translated into results," Russell said.
"There have been, for example, in the County Championship four or five times when we've had all day to bowl a side out and have failed to do so.
"There have been a number of occasions in one-day cricket - numerous occasions in one-day cricket - when the opposition batting first with five or six overs to go and we've contained them to a manageable score and then we've allowed them to score 40, 50, 60 [runs].
"We have the players, we've supplemented them with people like [captain] Jamie Dalrymple and James Allenby so the potential is there.
"We have now been an unsuccessful side for five years and over the last five years we have won, on average, 17% of our games... that is not good enough," Russell added.
"Our members and supporters are enormously restless, I have a bulging mailbox every week."
Although Russell says that not everyone associated with Glamorgan is of the same mind, he remains content with Maynard's stewardship of the team.
"We have a warm relationship, we've known each other since 1992," said Russell of ex-Glamorgan captain Maynard, who first joined the county in 1985 as a batsman - averaging 42.53 runs in his first-class career.
"We had a strong personal relationship before he left the club to work with England and be one of [former Glamorgan and England head coach] Duncan Fletcher's assistants and we rather lost touch for a while.
"I was instrumental in bringing him to the club [in a coaching role], he was my choice, I think he is an enormously talented cricket coach.
"He has a breadth of cricketing knowledge and technical vision that never ceases to impress me.
"And I know that he shares my frustration with some of the obvious failings of some of our players, some of the time.
"I have faith in Matthew as an extremely talented coach and I am content - for the moment - to rely upon his judgement in terms of the way we should be taking this team forward.
"But... that is my personal view and, contrary to popular opinion, what I say does by no means always go in the club."
*Watch the extended Sport Wales interview with Paul Russell this Friday on BBC TWO Wales at 2200 BST.
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