1) Flexibility 2) Manageableness 3) Tractability 4) Tractableness 1) Manageableness 
• (n.) The state or quality of being manageable; manageableness.
Man`age·a·bil'i·ty noun The state or quality of being manageable; manageableness. 
[n] - capable of being managed or controlled
manageable, manageability, manageableness, manageably That which can be managed or controlled: 'These are manageable problems.'
manageableness noun capable of being managed or controlled
An informal measure of how easily and effectively an IT service or other component can be managed.