Challenge:

The challenge in this scenario was the collapse of a wall at a hydro power plant, specifically at the power house near Nashik. This incident resulted in an insurance claim amounting to 1 crore rupees. Furthermore, it was determined that a design defect played a role in the wall collapse.

Solution:

According to Aaryan's report, the establishment of a design defect was the key finding. However, the text does not explicitly mention the recommended solution or course of action to address the design defect or the wall collapse.

Benefits:

The benefit of identifying the design defect was that it provided clarity regarding the root cause of the wall collapse. This information could potentially be used to develop an appropriate solution in the future, ensuring that similar incidents are avoided, but the text does not specify this solution or its benefits.