[Mutual exclusivity] Any final choice you make will be at the expense of the profits/benefits that could have been generated by the excluded project
Mutual exclusivity is a statistical term describing at least two events that can not take place simultaneously.
It is used to describe a situation where the occurrence of one event is not influenced or caused by another. For example, the same person who owns a sum of money cannot simultaneously invest it in an investment fund and buy company shares. Another example: the results of tossing coin run may result in "heads" or "tails", but not both. These results are collectively exhaustive, that is to say that one of the two must necessarily occur in order to eliminate the remaining possibility. However, any mutually exclusive event is not exhaustive because, in the case where one draws a six-sided dice, two opposing sides are mutually exclusive, but other results are possible on the four other faces.
In the corporate world, the concept of mutual exclusivity is applied in capital budgeting. Firms often have to choose between a number of different projects in order to add value to the business. Some of these projects are mutually exclusive, like the sides of a coin, while others, like the faces of the dice, are independent. Here is a scenario:
A company has a budget of 50,000 euros to invest in new projects. Projects A and B cost 40,000 euros each and project C only costs 10,000: the company can combine A and C or B and C, but not A and B; A and B are mutually exclusive while C and A and C and B are independent.
Thus, faced with two mutually exclusive options, the company must consider the opportunity cost related to each of these projects because the final choice will be at the expense of the profits that could have generated the excluded project.
Focus is saying no to 1,000 good ideas.
The last 10% is 90% of the work.
I'm convinced that about half of what separates the successful entrepreneurs from the non-successful ones is pure perseverance. It is so hard. You put so much of your life into this thing. There are such rough moments in time that I think most people give up. I don't blame them. Its really tough and it consumes your life. If you've got a family and you're in the early days of a company, I can't imagine how one could do it. I'm sure its been done but its rough. Its pretty much an eighteen hour day job, seven days a week for awhile. Unless you have a lot of passion about this, you're not going to survive. You're going to give it up. So you've got to have an idea, or a problem or a wrong that you want to right that you're passionate about otherwise you're not going to have the perseverance to stick it through. I think that's half the battle right there.