CONTRACTOR SELECTION PRE QUALIFIACTION CRITERIA TECHNICAL FACTORS How rates of pay of labour can be assessed reasonable in technical factors of pre qualification questionnaire.it is changing drastically because of labour shortage?

1. There really is no absolute proof and a lot depends on good will, existing records and a will to be transparent.

2. Again, you can't be sure but union leaders can be a good source of potential problems and good practice

3. In short nothing. If this causes delays then liquidated damages are payable which would not be what the contractor wants.