The distribution of attributes across a player’s profile effectively determines their Current Ability.
A player with 20 in all positive areas would be as close to the maximum ability score as possible; it wouldn’t be 100% certain because the number of positions they can play, as well as their competence with either foot, can affect the final number.
Some attributes have a higher ‘weighting’ towards a player’s overall ability as they are fundamentally important to succeeding in any position.
Most Physical attributes, as well as Anticipation, Decisions, and Positioning are the most heavily rated for any position, while each position carries appropriate weightings for attributes crucial to performing to a high standard in that area of the pitch.
The ‘Highlight Key Attributes’ button on a player’s profile offers an insight into what each of these attributes are per position.
Source: SI Games