Roulette (curve) in this case, the point lies on the circle then the roulette is a cycloid. A related concept is a glissette, the curve described by a point attached to a given curve as it slides along two (or more) given curves. Formally speaking, the curves must be differentiable curves in the Euclidean plane. The "fixed curve" is kept invariant; the "rolling curve" is subjected to a continuous congruence transformation such that at all times the curves are tangent at a point of contact that moves with the same speed when taken along either curve (another way to express this constraint
Point of total assumption an interesting chart. For contracts subject to the Federal Acquisition Regulations, FAR 16.403-1 provides the Government description of FPI. The contract type is implemented by calling out FAR Clause 52.216-16 Incentive Price Revision - Firm Target. This clause captures the Ceiling Price as well as the government share ratio(s). If multiple line items are identified as FPI type, the individual line item information shall be included here, otherwise final contract costs and price are reconciled at the contract level. Point of total assumption The point of total assumption (PTA) is a point on the cost line of the profit-cost curve