TABLE I.

Fault categories, types and mutation operators specific to BPs [5].

Fault Category	Type	Equivalent Mutation Operator	Description
Variable assignment	Replacement of Variable Identifier	ISV	Replaces variable identifiers of same type, i.e, serviceB.var1 = serviceA.var1 to serviceB.var1 = serviceA.var3 or serviceB.var1 = c
Control flow	Activity removal	AEL	Removes an activity
	Change of Activity Order	ASI	Changes the order of two child activities in a sequence
	Replacement of Sequential to Parallel loop	AFP	Replaces activities in a sequential loop with a parallel structure
	Replacement of Sequence to Flow Structure	ASF	Replace a sequence activity by a flow activity
Branching	Removal of Branch Path	AIE	Removes an Elseif element from an If structure
	Removal of Join Condition	AJC	Removes joinCondition of an activity
Expression	Replacement of Arithmetic operator	EAA	Replaces arithmetic operators (+, −, ×, /, mod) with another one
	Removal of Unary Operator	EEU	Removes unary operator (− or +) in an expression
	Replacement of Relational Operator	ERR	Replaces a relational operator (<, ≤, >, ≥, ≠, =) by another relational operator
	Replacement of Logical Operator	ELL	Replaces a logical operator (∧, ∨) by another logical operator
	Replacement of Path Operator	ECC	Replaces a path operator (/, //) by another path operator
	Modification of Numeric Constant	ECN	Incrementing/decrementing the value of a numeric constant by 1 or changing one digit