They'll probably want cost estimates and some examples of what other companies are doing. You might also check out the space situation and begin to figure benefits vs. costs. And you might want to contact some of the childcare management companies in the country. The benefits are crystal clear. They match company hours, so the need for odd-hour childcare is diminished.
Public image is enhanced.
And even child-free employees say it makes them proud of their company, gives the company a family feeling. On the downside, like having a baby, once you have a center you have a center. If your population changes, you still have a center and have to decide how to make it work. And money can be a downer if the company doesn't have enough of it, or isn't willing to invest enough to make it a success. Since it really represents the company, you'll want the quality to be better than your average center, and that costs money.