Before revision:  We first rigorously analyze a deterministic variant of the online threat model by drawing parallels to the well-studied k-secretary problem and propose  , a simple yet practical algorithm yielding a provably better competitive ratio for k=2 over the current best single threshold algorithm .
After revision:  We first rigorously analyze a deterministic variant of the online threat model by drawing parallels to the well-studied k-secretary problem and propose k-secretary problem in theoretical computer science and propose Virtual+ , a simple yet practical algorithm yielding a provably better competitive ratio for k=2 over the current best single threshold algorithm .