The union leader Bob Crow said, of the LU: "It's their bully-boy management style which has forced us into this dispute."
He continued "LUL seem to be hell bent on confrontation by tearing up the Signals Framework Agreement and by unilaterally introducing new working practices which mean they can make people work what hours they like, when they like."
London Underground are denyiing the union's allegations and their chief maintenance officer, Phil Hufton, said striking over rosters was "ludicrous".
He said: "We are planning to introduce a roster covering 24 hours a day, seven days a week, to ensure planned engineering staff are always available. That agreement already exists, but the RMT is trying to tear it up.
"They should stop threatening industrial action at every opportunity."
As yet it's not been announced when the strike action would take place if the dispute is not resolved.