Procurement as a Service Market Size, Share & Industry Analysis, By Component (Process Management, Spend Management, Category Management, Contract Management, Strategic Management, and Transactions Management), By Enterprise Type (Small and Medium Enterprises (SMEs) and Large Enterprises), By Industry (BFSI, IT & Telecom, Manufacturing, Healthcare, Retail & E-commerce, Energy & Utility, Oil & Gas, Travel & Hospitality, and Others), and Regional预测，2024 - 2032