• aboutale. What is the arrow with a triangle on its head between "insert card" and "type code"? why not an "include" or "extend" relation? More or less the modelling is correct but I'm not too crazy about most of the important actions being so removed from the actors. There are some missing relationship that trigger the maintenance actor: when the machine doesn't work, the customer notices and notifies the bank (or the bank notices), which calls maintenance. All multiplicities are missing.
• ATM: can't read this file either with umbrello or with eclipse.
• batisse: more or less OK but it seems that the subsystem "technician"-"criminal" is totally disconnected from the main subsystem "customer"-"bank". I don't think this is correct.
• ladjal: nice attempt to model the effect of the sun, but the "sun" actor does not "confirm". Rather, it "prevents from working the ATM correctly" or something of the kind. In short, it increases the probability of the customer making a mistake. You should add a relation to a "bank" action "deactivate card".
• leruth: Overall, I like this model but what are the undirected edges between action nodes (such as "databank"-"transfer data")? I think this denotes an unclear idea of who/what is an actor and an action.
• ramadan: Graphically, this model is very clear, and I think each subsystem has been modelled correctly. I think however that "include" and "extend" labels are more or less random (the concept that A "extends" B corresponds to a class A that inherits from a class B, whereas the concept that A "includes" B corresponds to a class including an data field of type B). Furhermore, the subsystems are detached. Some actions should be related by logical relation (for example: why not add an "exhaust cash" action by the customer that is in "AND" relationship with the "cash feed" bank action?
• roblero: even the most vivid imagination cannot transform this into a valid use case diagram. There are inter-action relations that are not include or extends or even logical, and the arrow "banque"-"des operations bancaires" is in in the wrong direction.
• tonio: man, I said "simple"!
• voillequin: more or less the same remark as for roblero above.
• zarrouati: more or less. But many "syntax errors" like a directed arrow between an action and an actor ("send request" to "banque"), and some wrong multiplicities (a "client" may usually type the code 3 times if he/she gets it wrong, not just once!). Again, some subsystems are totally disconnected.