Union’s Responsibility with respect to quality of service

What Is a Union’s Responsibility with respect to quality of service

F​‌‍‍‍‌‍‍‌‍‌‌‍‍‍‌‍‌‌‌‍​rom a public sector local municipal level what responsibility does a union have for quality service delivery? Support your view with the work of others (research).​‌‍‍‍‌‍‍‌‍‌‌‍‍‍‌‍‌‌‌‍​What can they do to promote quality service?