"degree to which a product or system can be effectively and efficiently modified without introducing defects or degrading existing product quality." "NOTE 1 Implementation includes coding, [...]
"degree to which a system or computer program is composed of discrete components such that a change to one component has minimal impact on other components"
Scale refers to "Ordered set of values, continuous or discrete, or a set of categories to which the attribute is mapped." (ISO/IEC 25040-1:2011) "EXAMPLE Types of [...]
Noun: "variable to which a value is assigned as the result of measurement." Verb: "make a measurement." "NOTE The term “measures” is used to refer collectively [...]
"degree of effectiveness and efficiency with which a product or system can be modified by the intendedmaintainers". "NOTE 1 Modifications can include corrections, improvements or adaptation [...]