Usability Study on Healthy Food Restaurant Finder

: Good nutrition is an important part of leading a healthy lifestyle. However, it is not easy to maintain a well-balanced diet every day especially when we are eating in a restaurant. Besides, people nowadays have low awareness about the food ingredients and it is not easy to measure the nutrition when people are preparing their own food or having meal outside. In addition, application such as Food panda, Grab Food and Facebook only recommend users about the best restaurant but do not include information about healthy eating. Therefore, the purpose of this project namely Healthy Eat Out application, is to help people to find the nearby healthy food. The app is developed using Android Studio via prototyping methodology to achieve user’s requirements. This application is able to give information about food ingredients to users including how much calories the food contain. This can help to extend the knowledge of user about healthy food and create awareness of people when choosing eating outside.


Introduction
Food is essential for every human being. A study revealed that more than 80,000 new cancer cases are estimated to be associated with suboptimal diet among US adults in 2015 [1]. Such intake can also cause chronic illness therefore; people need to take healthy food because good nutrition is an important part of leading a healthy lifestyle [2]. There are many restaurants that serve healthy options such as vegetable sides or baked potatoes instead of French fries or water instead of soda [3,7]. However, the people always have limited time to explore the new restaurants. Therefore, Healthy Eat Out is an application to help people to find healthy food restaurant in Kedah state, Malaysia. Healthy Eat Out application has its function including search restaurant, view restaurant, view food and ingredients for the user to find the healthy food restaurant easily. Users can know directly about the healthy food of each restaurant. This will solve the problem of existing application and increase the awareness of people about the important of taking healthy food.

Background and Related Studies
Based on a previous national nutrition survey conducted in Malaysia, Malaysian adults had a daily median energy intake of 1466 kcal/day or 64% of the Malaysian Recommended Nutrient Intakes (RNI), with men (1489 kcal/day) reporting a higher median energy intake than women (1445 kcal/day) [3]. The study observed that energy intake among the Malaysian population falls below the recommended intake level. Even for people at a healthy weight, a poor diet is associated with major health risks that can cause illness such as heart disease and cancer. In addition, poor diet quality is the primary risk factor responsible for the increased prevalence of obesity [4]. Therefore, people need to concern about the healthy level of food they take every single day such as how many calories the food contain or what is the sugar level they should observe for each day. Mostly, people are unclear about to whom the calorie and nutrient values applied and how this information was relevant to their own dietary requirements [5][6]. It is hard to measure the nutrition when people are preparing their own food or having meal outside.
Based on Google Play Store, mobile application such as Healthy Out and food Tripping can be described as application that help users to find the nearby healthy food restaurant. This application can also give information about the nutrition for dishes including calories and sugar. However, the application is not available in Malaysia. Besides, the application such as Facebook which can be accessed by Malaysian only suggests the best restaurant but does not consider on the healthy level of food provided [8]. Table 1 below shows the features of some existing applications. Open Rice Recommends nearby restaurant for the user. Users can also get the information such as location, price of food and operation hour from the application.
Therefore, for this project the Healthy Eat Out application is developed for the users in Kedah, Malaysia as a case study. This application is to help users to search nearby healthy food restaurant. It also provides the information on healthy food such as price and ingredients to users. Users can choose the suitable restaurant for them to eat out. It is easier and helpful because they do not need to explore all the restaurant to find the healthy food in Kedah.

Methodology of The Study
The methodology for this project follows the prototyping approach. According to International Software Testing Qualifications Board (ISTQB), the basic idea in Prototype model is that: "Instead of freezing the requirements before a design or coding can proceed, a throwaway prototype is built to understand the requirements. Prototyping is an attractive idea for complicated and large systems for which there is no manual process or existing system to help determine the requirements." A prototype model can be implemented as in Figure 1 shown below: The requirements of Healthy Eat Out application are gathered through a series of interviews with a number of potential users. Next, based on the gathered and analysed requirements, a preliminary design for the app is produced. This followed by the building and prototyping phase, in which the first prototype of Healthy Eat Out is developed based on the preliminary design. Initial version of the app represents an approximation of the characteristics of the final project.
In the evaluation phase, the users thoroughly evaluate the first prototype, noting about the strengths and weaknesses such as what need to be added or removed to improve the performance of application. The evaluation results and remarks from the users are collected and analysed. The findings provide input to the refinement of initial prototype. The steps are repeated from prototype design to refinement until the users' satisfaction has been achieved, hence that the prototype represents the desired final product. Lastly, in the final product phase, the final version of the Healthy Eat Out application is constructed. The final system is also thoroughly evaluated and tested. Furthermore, routine maintenance is to be carried out on a continuing basis to prevent large-scale failures and to minimize downtime.

Design and Development to Healthy Eat Out
This section is discussed in twofold. Firstly, the requirements of Healthy Eat Out application are discussed, followed by the description of application prototype development.  Figure 2 illustrates the use case diagram and the communications between the use cases and the actor for the Healthy Eat Out that can be used to allow users to search for healthy food restaurants. Five major use cases are login, sign up, view food, add food and manage food.   The structural components of Healthy Eat Out application are represented in a class diagram as depicted in Figure 5.

The Healthy Eat Out Prototype Development
In this phase, the prototype of Healthy Eat Out was developed. It complies all the requirements described in the previous subsection. The prototype was developed in the Android Studio integrated development environment (IDE). Meanwhile, the crucial functions including user authentication, and database for data storage, were created using Firebase development platform. Screenshots in Figures 6 and 7 show the selected interfaces of Healthy Eat Out.

A. The Evaluation Setting
For evaluation of usability acceptance, user feedbacks were collected from 30 respondents consisting of Universiti Utara Malaysia (UUM) students. The respondents were approached randomly at UUM and participated in the study on a voluntary basis. The instruments used for the evaluation were the Healthy Eat Out application and post-task questionnaire. The questionnaire was filled up by the respondents. The questionnaire consisted of respondent demography and background information, and application usability and the feedback or suggestion for improving the application.

B. The Respondents' Demographic Information
Analysis of the respondents' demographic information revealed that 67% of them is female and 33% of them is male.

C. The Usability of Healthy Eat Out
The sections measure the respondents' perception towards Healthy Eat Out functionality, user interface and user acceptance. Figures 9 -11 summarise the frequency and average of the responses. The respondents rated four or five of the post-task scales for three aspects of the usability (i.e. functionality, user interface and user acceptance. None of the respondents rated one or two. Only a few rated three. The majority of respondents agree on the good functionality of Healthy Eat Out application. There were 26 of respondents agreed that the application has good description of its functionality. Besides, there were also 26 of respondents agreed that the healthy food restaurant is clearly listed in the application. In addition, there were 27 of respondents agreed that the application is able to pop up an error message.
Furthermore, there were majority of respondents agreed on the good user interface of the Healthy Eat Out application. There were 27 of respondents agreed that the theme colour of the application is suitable. Besides, all of the respondents felt comfortable with the design of the application. Furthermore, there were 26 of respondents thought that the structure of the interface is logically and systematic.
In addition, there were majority of respondents agreed on the Healthy Eat Out user acceptance features. There were 27 of respondents felt very confident using the application.

User Acceptance
Disagree Average Agree that they would search healthy food restaurant by using Healthy Eat Out application. Furthermore, there were 25 of respondents were likely to recommend this application to others.

Conclusion and future works
According to the feedback collected, most of the respondents think that the application is simple and easy to use. Some of the respondents think that this application should have google maps so that the user can search for the location of healthy food restaurant directly. Besides, some of the respondents suggested that it is better if the application could show the picture of the restaurant and more pictures about the healthy food.
Besides, some of them also gave feedback about the design or interface of the application. Some of the respondents think that the application can be more colourful to attract the users. Generally, majority of the respondents were satisfied and comfortable with the developed Healthy Eat Out application.