Framework for this case?

If an interviewer makes a case like this, you should try to better understand the context. If no additional context is provided, I would try to solve the case by making assumptions on key variables characteristing market entrance and discuss different scenarios. 

For instance, consider these 2 variables:

• Client market share
• Type of market entrants 

Depending wheter:

• The client is market leader vs minor player in the market 
• New entrants are large corporations growing by adjacencies vs new emerging startups testing a new business model with strong traction 

By mixing these factors, you could already build 4 scenarios and provide a structured answer to the interviewer. 

Hi,

It's impossible to provide a structure without knowing the context and the objective of the case. Either you did not ask the clarifying questions to the interviewer, or you skipped the details while posting it here

Best