Does 'Based on our 1992 survey, we estimated lead times for two different   standard  lead times that represent performance for a typical product in the supplier's selection and  shortest  lead times that indicate a supplier's best practice.' exist in a separate context from 'Our 1992 survey investigates production lead times.', without logical interdependence?
Based on our 1992 survey, we estimated lead times for two different   standard  lead times that represent performance for a typical product in the supplier's selection and  shortest  lead times that indicate a supplier's best practice.###Our 1992 survey investigates production lead times.