Research Finding:
Many researchers recommend avoiding going to more than four levels.

IfSQ Defect Indicators based on this finding:

Sources:

No cover photo for Professional Software, vol. 2, Programming Practice

Professional Software, vol. 2, Programming Practice

Cover of Software Reliability

Software Reliability

Cover of ACM Sigplan Notices

Some Pascal Style Guidelines

  • Recorded 1981 in ACM Sigplan Notices, 16, no. 4, April
  • Pages 70-80
  • David Marca