Don't want to spend the large amount of money

An organization decides that they don't want to spend the large amount of money to use a 360-degree survey from an established vendor and instead decides to develop their own survey. An employee in the human resource department is asked to create a list of 50 questions about different areas of leadership performance. Two of the senior managers look at the questions briefly and then send out the survey as part of a 360-degree process. Once the results come in, there is no rhyme or reason to the results For example, one top performing leader in the organization gets perfect performance scores from some employees and very negative scores from other employees. Management is not sure if the results from the survey can be trusted or not.