この場合の「のりしろ」は「柔軟で融通可能な範囲で」という意味だと思います。

just a guess
http://www.investorwords.com/581/bridge_loan.html

just a guess

Just a suggestion...

のりしろ, in its figurative sense, usually means a buffer space where you can cushion the effects of some unexpected incidents or, conversely and less frequently, where you can move freely without causing adverse effects on whatever outside your area of responsibility.

If what follows 今後ののりしろとして is the company's action plan, then they might be planning to create a safe margin to secure some level of results or performance of whatever they are doing.

The exact translation will really depnd on the context, but I can suggest "buffer", "margin", and "maneuvering space" as candidates. Perhaps you want to be a bit more creative. I might also translate 今後ののりしろとして as "to further secure ..."