achievable

attainable

at·tain·able AW [attainable]   [əˈteɪnəbl]    [əˈteɪnəbl]  adjective
that you can achieve
• attainable goals/objectives/targets
• This standard is easily attainable by most students.
Opp:  unattainable  
Example Bank:
• We believe that this level of performance is fully attainable.
• This level is easily attainable by most students.

• We need to set challenging but attainable targets.