GUIDELINES TO NRDC feb 24 2014

Step 2: Gather Information, ContinuedCriteria andfactsWhile all data sources are important, criteria and facts are most important:x Criteria are standards a solution must meet. If it meets all criteria, it's likelyto be a good solution.x Facts represent truths that uphold a solution.Note: While criteria and facts are the most important data sources, constraintscould overshadow them. If severe, constraints could be the most importantconsideration. If a solution is surrounded by too many constraints, it's likely tobe a poor solution.Assumptions:definitionHmmm.Assumptions are--x Suppositions on current and future events taken to be true, but unproved.x Educated guesses stating what's likely to occur in view of experience andinformation at hand.x Statements of conditions that must exist to reach a solution.Valid assumptions--x Substitute for missing facts bearing on the problem.x Describe future events affecting a solution's success.x Are necessary for continued planning.When to useYou'll never get all the facts, so use assumptions to fill information gaps. Usethem to--x Provide a substitute for missing facts.x Define limiting factors.x Forecast contingencies.ExamplesWhen todiscardExamples of assumption statements:x Existing resources will support solution.x Additional resources won't be available.x Mission will remain unchanged.Caution: Don't use too many assumptions--you'll assume away the problem.Discard assumptions when facts overtake them or if proved invalid.NRDC GRC – Staff Handbook 5-5