Performance improvement is an activity that all organisations must undertake to gain competitive advantage or simplify to maintain parity with the progress of competitors. Such improvement efforts are frequently undertaken in an ad-hoc manner. These are usually ineffective, with projects failing to improve the aspects of the organisation that deliver customer value, and inefficient with resources being wasted. In response to this situation a methodology was developed to aid business processes diagnosis and to design appropriate improvement projects that possess the potential to deliver exceptional improvement.\ud \ud The methodology was designed using time as the key performance metric for analysing business processes and practices. The time-based approach makes the methodology powerful yet simple. The simplicity enable users from within a company to adopt and apply the methodology, a feature that gives the methodology considerable strength.\ud \ud Applications of the methodology in twenty-five organisations found it effective in providing insightful analysis and designing solutions that, when implemented, led to significant performance improvements. The methodology demonstrated a high level of generality, having been applied in organisations as diverse as multinational corporations and Small and Medium sized Enterprises, SMEs, across both manufacturing and service business sectors.\ud \ud Application of the methodology uncovered the need to find better approaches to supply chain modelling and to managing programmes of performance improvement projects. In response, two new techniques were developed and validated. The first was the Time-based Supply Model. This device models the effectiveness of the processes that thread together supply networks using time as the key performance measure. The second was a structured idea-management system for performance improvement projects that uses a stage-gate approach to programme management. Combining this approach with the time-based methodology produced the Performance Improvement Model. This device provides a structure for managing the strategic direction and resource allocation of multiple performance improvement projects
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