SCENARIO.

Presently, various kinds of vending machines are available in the market, from as simple as coffee vending machine into a more complicated one like snacks or pizza vending machines. Taking a pizza vending machine as a study scenario, you are required to design an innovative and reliable pizza vending machine specifically targeted for Malaysian pizza lovers where the main goals are to:

"Deliver a hot, crispy and tasty pizza, in the shortest time, in full respect of your standard, without pollution and lowest energy consumption".

The features of this pizza vending machine comprises of:

1. Serve traditional Malaysian recipe pizzas for absolute customer taste and convenience (example: Satayrony pizza, Sambalicious pizza, etc).
2. Deliver selected size high quality pizzas within 4 minutes. The selection of sizes are:

• Small-size.
• Regular-size.
• Large-size.

3. Two (2) oven exist to deliver up to two (2) pizzas at the same time.
4. Equipped with 32' user friendly display screen that suit all categories of users namely:

• Novice users.
• Intermediate/intermittent knowledgeable users.
• Expert users.
• Disabled users.

5. Available with all payment systems (cash, cashless).

The pizza vending machine needs to guarantee the main compliance namely:

1. Hygiene (operates without any handling and in accordance with food hygiene standards and no contamination into vending machine).
2. Safety (easy to handle, equip with appropriate instructions and alert messages).
3. Quality (innovative and reliable design offering the best cooking surface technology to serve great taste pizza, lowest energy consumption).

Note:

Successful designers must be able to go beyond the intuitive judgments and look for helpful guidance. Walk through the steps in a consumer decision process: problem recognition, information search, alternative evaluation, selection criteria, purchase decision, and post-purchase behavior.

QUESTION.

1) State clearly the appropriate users, the interaction styles and the input and output devices involved.

2) Based on the scenario given, by using the hierarchical task analysis (HTA), draw the task diagram and describe your plan in the process of buying two (2) pizzas from the pizza vending machine. (Hints: You can provide your answer either in textual representation or graphical view).