1. A computer-implemented method comprising: defining a storage pool for a storage system being designed that includes a plurality of storage tiers, wherein each storage tier has a different level of performance; defining a first workload for the storage system, wherein the first workload includes: a first target skew factor, wherein the first target skew factor is a relative Input/Output operations per second (IOPS) percentage when a sum of the IOPS percentage plus a corresponding aggregate capacity percentage equals one, a first capacity requirement, and a first IOPS requirement; generating a first density function based, at least in part, upon the first target skew factor; applying the first workload to the storage pool, thus defining a first allocated workload; and determining a distribution of the first IOPS requirement amongst the plurality of storage tiers included within the storage pool based, at least in part, upon the first allocated workload and the first density function.