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In the context of dominance based rough set theory, a decision table is a four tuple where
U is a finite set of objects. In given dataset, U comprises objects: { x1, x2, x3, x4, x5, x6, x7 }
Q is a finite set of criteria (The attributes with preference-ordered domains are called criteria).It contains conditional and decision attribute. In dataset, Physics and Chemistry are conditional attributes and Final-Grade is decision attribute.
𝑉 is the value set of criteria q. Value set of criteria ¡®Physics¡¯ is { A, B, C}
f: assigns a particular value to an object x for attribute q.
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