The phrase "wide range of techniques" means having many different methods or approaches available for accomplishing a task or solving a problem. Full definition
Have conducted both private group training classes, using a variety of training tools as well as wide range of techniques. (jobhero.com)
Hense continues to expand an already wide range of techniques in mark making to a monumental scale, marks that might be a brushtroke on canvas are meters in length. (graffuturism.com)
One should be a conflict preventer, says the author of Managing Conflict at Work, Clive Johnson in his book that provides a wide range of techniques and tactics via which an entrepreneur can manage employee disputes at workplace. (entrepreneur.com)