Using your substitutes wisely

It seems to me that a lot of teams treat the matchday as a squad game i.e. all 18 players (the 11 who start and the 7 on the bench) are potential matchwinners.
What seems to happen to me at Morecambe is that there is just hope that the starting eleven can "do the business" and if its not working just throw on a couple of panicky substitutions after 80 to 87 minutes, far too little and too late.
Surely a manager should have a plan B and even a plan C for every game?
I do understand of course that no-one can predict sudden injuries during games which mean an unexpected substitution has to be made, but it does appear that Sammy does not have a measured approach to his substitutions whereas even other League Two managers are often seen to bring someone on after, say, 55-60 minutes with a view to trying to change the game. Do any of you agree with me?
What seems to happen to me at Morecambe is that there is just hope that the starting eleven can "do the business" and if its not working just throw on a couple of panicky substitutions after 80 to 87 minutes, far too little and too late.
Surely a manager should have a plan B and even a plan C for every game?
I do understand of course that no-one can predict sudden injuries during games which mean an unexpected substitution has to be made, but it does appear that Sammy does not have a measured approach to his substitutions whereas even other League Two managers are often seen to bring someone on after, say, 55-60 minutes with a view to trying to change the game. Do any of you agree with me?
