In G. E. multi factoral analysis, How can I precisely measure the Industry attractiveness and the Business strength?

To analyze the attractiveness of any industry, I have personally found Porter's 5 force analysis to really provide the answers; of course the accuracy, depth and reliability of the information we collect will ultimately play an important role and hence within the completion process of the analysis you need to make sure of its transparency and completeness.

1- Identifying the present corporate strategy
2- Applying the industry attractiveness test
3- Applying the competitive strength test
4- Applying the strategic fit test
5- Applying the resource fit test
6- Ranking businesses on historic & future
7- Ranking businesses on priority for resource allocation
8- Crafting new strategic moves Every one from above need to tools you have to search about them.