| Input: software source code. |
| Output: key classes in DWCIS-Network. |
| (1) | for each class interaction from class to class do 2–5 / DWCIS-Network construction / |
| (2) | Extract class , class as , and put them into set ; |
| (3) | Extract the class interaction from class to class as and put it set ; |
| (4) | is calculated for by formula (1), put it into set ; |
| (5) | and are calculated by formulas (3) and (4) and put them into set ; |
| (6) | With 1–5, DWCIS-Network is obtained; |
| (7) | for each in do 8/ Initialization stage / |
| (8) | is initialized with by formula (6); |
| (9) | is initialized with 0 by formula (7); |
| (10) | for each in dimensional do 11 |
| (11) | is initialized by formulas (8) and (9); |
| (12) | while the constraint condition of formula (12) is not true do 13–15 / Iteration stage/ |
| (13) | for each in of dimensional do 14, 15 |
| (14) | is calculated by formula (11); |
| (15) | is updated by formula (10); |
| (16) | for each in do 17 / Iteration completed/ |
| (17) | is calculated by formula (13); |
| (18) | All classes are ranked in descending order by using corresponding scores in the set of , top- classes are obtained and key classes are identified; |
