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Decision Support Tool (DST)

Decision Support Tool (DST). What is the Decision Support Tool?. Decision Support Tool (DST). What is the DST? A way of helping make decisions related to hybrid vehicles Decisions can be complex, multi-faceted and often have to be made with limited information…

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Decision Support Tool (DST)

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  1. Decision Support Tool (DST) What is the Decision Support Tool?

  2. Decision Support Tool (DST) What is the DST? A way of helping make decisions related to hybrid vehicles Decisions can be complex, multi-faceted and often have to be made with limited information… ..using the DST will make decision-making easier, faster and repeatable.

  3. Decision Support Tool (DST) Who is it applicable to?

  4. Decision Support Tool (DST) Who is it applicable to? Members of the public Commercial Users Suppliers Local/National Government Vehicle Manufacturers

  5. Decision Support Tool (DST) How does it work?

  6. Decision Support Tool (DST) How does it work? STEP 1 – DECISION QUESTION Start by defining the decision to be supported. Decisions categorised by decision maker type and decision type to aid selection. EXAMPLE I’m a private consumer PUBLIC I’m making a decision relating to vehicle PURCHASE Decision – I need to decide … … which vehicle to purchase from a set of identified vehicles?

  7. Decision Support Tool (DST) How does it work? STEP 2 – VALUE PROFILE Identify what is important to the decision maker – their value set. Nesting allows for level of detail to reflect knowledge of user. EXAMPLE – Vehicle Purchase Specify importance on 0 (lowest) to 10 (highest) importance for set of factors relevant to purchase decisions. Both quantifiable aspects such as purchase cost and subjective factors such as aesthetics (appearance) can be included.

  8. Decision Support Tool (DST) How does it work? STEP 3 – VALUE PROFILE(2) Identify how the decision maker’s preference varies with variations in the factors on which the decision is based. EXAMPLE – Purchase Cost When does a difference in price between 2 vehicles impact your preference for a vehicle? e.g. if you are considering between 2 £20k vehicles, does £100 difference in price influence your decision, or are you indifferent to such a small price difference?

  9. Decision Support Tool (DST) How does it work? STEP 4 – DECISION SPECIFICATION Define the scenario in which the decision is being made i.e. information which provides context for the decision. • EXAMPLE – Vehicle Purchase • Information captured about how and where the vehicle is used. • road types – motorway, urban etc. • driving style • across congestion charging zone? • annual mileage

  10. Decision Support Tool (DST) How does it work? STEP 4 – DECISION SPECN (2) Specify each of the options being considered and evaluated, both factual and subjective impressions. • EXAMPLE – Vehicle Purchase • Information captured about the vehicles. • Factual – weight, drag co-efficient etc. • Subjective – aesthetics, image etc. • Data, such as fuel economy might be entered directly, or generated through simulation.

  11. Decision Support Tool (DST) How does it work? STEP 5 – DATA PROCESSING Input data is now processed using PROMETHEE methodology. Might include simulations, cost model calculations etc. to generate data. EXAMPLE – Vehicle Purchase Vehicle simulation - WARPSTAR returns fuel economy for a drive cycle generated based on users use profile. Figure more representative of real-world economy. g/km

  12. Decision Support Tool (DST) How does it work? STEP 6 – RESULTS Options ranked. This might include continuous options such as determining optimum price. Confidence in results also indicated. EXAMPLE – Vehicle Purchase Vehicles ranked according to preference of decision maker Based on specified value set and specification data.

  13. Decision Support Tool (DST) How does it work? STEP 7 – DESIGN BY ITERATION What if questions analysed. Tool could be used recursively but slow. Automation through inputs as variables or targets. EXAMPLE – Vehicle Purchase What if someone else also drives the vehicle? What if I do less/more miles per annum? What if …. ?

  14. Decision Support Tool (DST) What are the benefits of using the DST?

  15. Decision Support Tool (DST) What are the benefits of using the DST? Improved decision making through • consideration of factors in a structured format. • ability to test sensitivity to changes. • assistance in generation of accurate data e.g. link to simulation. • capture of different perspectives across business in a formal, non-technical manner.

  16. Decision Support Tool (DST) What are the benefits of using the DST? Leads to : • Accelerated decision taking through clear process and identification of required information. • Reduced changes in programme. • Easy-to-review reasoning behind decisions taken as auto captured and documented. • Easy to see the effects of changes during programme if assumptions used differ from reality. Business Benefits : • Reduced time to market • Reduced rework

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