If a patient is able to achieve the target heart rate, a regular treadmill stress test is capable of diagnosing important disease in approximately 67% or 2/3 rd of patients with coronary artery disease.
Negotiation is an important part of the role of the purchasing professional. It is a skill that is learnt and training can help purchasing staff in understanding what is needed when negotiating with vendors.
Consider these examples. When accepted by a vendor every PO becomes a contract, but not every contract is a PO. Some (but not all!) people view POs as a kind of one-time contract. Purchase Orders may cross-reference the terms of a negotiated contract. It's a common misconception that the level of detail in a PO is less than that of a contract.