According to Christensen what is a "value network"

a$.$

The activity system within the firm where individual activity choices align with strategic themes and

reinforce each other

b$.$

An ecosystem $-$ a set of connections between organisations interacting with each other to the benefit of

the group. Each member has adjusted to play its specific role in the functioning of the whole network

c$.$

The result of a Blue Ocean process depicting the industry's $"$as is$"$ proposition and a firm's target value

curve that creates new market space.