The NORM.INV Excel function, also known as the inverse normal distribution function, is predominantly used to calculate the value of a standard normal variable given a probability. While it is specifically designed for normally distributed data, it can still handle non-normal distributions effectively when certain conditions are met. However, it is important to note that the accuracy and reliability of results obtained from NORM.INV with non-normal distributions may be compromised. In such cases, alternative methods like transformation or approximation techniques may yield more accurate outcomes. It is also worth mentioning that specialized functions exist for specific non-normal distributions such as lognormal or Weibull distributions.