Nested ``IF``, ``CASE``, ``DO``, ``LOOP``, ``SELECT``, ``WHILE`` and ``PROVIDE`` statements is a key ingredient for making what's known as "Spaghetti code".
Such code is hard to read, refactor and therefore maintain.
== Noncompliant Code Example
With the default threshold of 3:
----
IF param1 = 2.
IF param2 = 4.
DO 3 TIMES. "Compliant - depth = 3, not exceeding the limit
IF sy-index = 2. "Noncompliant - depth = 4
CONTINUE.
ENDIF.
WRITE sy-index.
ENDDO.
