i want to know about the importance of direct services

Me too.

Direct services to the industry are important, because mainly they help in mastering the costs.

These services include:
- Supplying goods and equipment,
- Manufacturing (subcontractors),
- Consulting
- Technical services
- Training
....

thanks alot and it would be really nice if you can explain much more further about it giving examples, and i want to know about division of labour and specialization give examples too please..