Thank you for the opportunity to help you with your question!
some firms now prefer value webs to value chains because ;
1. value chain consist of steps in which material transfer from one
place to final place without any additional to it and they do not gain any value in the process while in value webs instead of transferring we add
some certain values to them like packaging, grading which makes them more appealing.
2.Value webs earn more profit to a company as compared to value chains. This is because value webs has a series of procedures followed so as to achieve the desired outcome thus making it more expensive. Value chains on the other hand does not require any procedure and is always involving dispatching goods from the producer to the customer only.
Please let me know if you need any clarification. I'm always happy to answer your questions.