Profitability is impacted when product costs rise without corresponding price adjustments. Understanding cost- price relationships is key to managing profitability in procurement.

Partnership sourcing improves efficiency through cost reduction and ensures continuity of supply by fostering long-term, collaborative relationships with key suppliers, as highlighted in CIPS guidelines.

Understanding customer price expectations and the potential for substitute technology are critical in product development to anticipate market trends and competitive threats, aligning with risk management principles.

Supplier relationships can result in value for money in the reduction of waste and in innovation developed as part of collaborative projects. Remember that in CIPS waste doesn't necessarily mean physical waste (as in stuff you don't want any more). There are 7 types of waste including waiting, inventory, transportation etc. So when you develop a relationship with a supplier, this can reduce waste (e.g. you may be able to get deliveries quicker by integrating your ordering system with the supplier's, or you might reduce transportation by agreeing a Consignment stock). Having a good relationship with a supplier isn't necessarily going to get you a reduction in cost or better payment terms. See p.70 for more details on this- there's a short list of ways in which good supplier relationships can bring value for money to a business.

It can be difficult for buyers in the private sector to build relationships with suppliers because of rules that state competitive tenders must be undertaken every few years (within the EU this is usually every 4). This means that both parties aren't as invested in developing the relationship as it's possible the contact will end shortly. Competitive tendering is a requirement in the public sector to ensure value for money for taxpayers.
See p.79 for further details. There are no rules stating Public Sector organisations can't have good relationships with suppliers, and in fact most will have good relationships with their current suppliers- the issue is that neither party can get too invested in the relationship as everyone knows it may end shortly. There are rules, however, against entering into Partnership relationships (which is discussed in chapter 3).