The crossword solution for the term 'Lively and Jaunty' is 'PERT', which is an acronym for 'Program Evaluation and Review Technique'. This technique is used in project management to analyze the duration of each task in a project. It is a method of planning and scheduling projects that breaks down the tasks into smaller, more manageable pieces. PERT is used to determine the most efficient way to complete a project and to identify potential problems before they arise.