How Does the Level Strategy to Sales and Operations Planning

How does the level strategy to sales and operations planning differ from the chase strategy? $$\begin{array}{l}\begin{array} { l r r r r r r r } & \mathrm { M } & \mathrm { T } & \mathrm { W } & \text { Th } & \mathrm { F } & \mathrm { S } & \text { Su } \\\text { Base Requirements } & 2 & 3 & 5 & 4 & 5 & 4 & 4\end{array}\\\begin{array} { l l l l l l l l l } \text { Employee } 1 & \mathbf { 2 } & 3 & 5 & 4 & 5 & 4 & 4 \text { Employee gets M/T off. } \\\text { Employee 2 } & 2 & 3 & 4 & 3 & 4 & 3 & 3 \text { Employee gets M/T off. } \\\text { Employee 3 } & 2 & 3 & 3 & 2 & 3 & 2 & 3 \text { Employee gets S/Su off. } \\\text { Employee 4 } & 1 & 2 & 2 & 1 & 2 & 2 & 3 \text { Employee gets M/T off. } \\\text { Employee 5 } & 1 & 2 & 1 & 0 & 1 & 1 & 2 \text { Employee gets W/Th off. } \\\text { Employee 6 } & 0 & 1 & 1 & 0 & 0 & 0 & 1 \text { Employee gets S/Su off. }\end{array}\end{array}$$