Making Informed Decisions to Improve Restaurant Image Using a Hybrid MADM Approach: A Case of Fast-Food Restaurants in an Island of East Malaysia
Abstract
:1. Introduction
1.1. Literature and Motivation of the Research
1.2. Contribution Statements
2. Research Methodology
2.1. Phase 1—Extraction of FFR Image Attributes from Past Literature
- People—refers to how the FFR employees serve, perform, and interact with the customers.
- Process—encapsulates all forms of methods involved right from receiving, preparing, and serving food orders to the customers, including promotional methods.
- Physical evidence—refers to the tangible features at the exterior or interior of an FFR that the customers can quickly notice.
2.2. Phase 2—Application of Modified Delphi to Validate FFR Image Attributes
2.3. Phase 3—Data Collection from a Sample of Customers
2.3.1. Sampling Approach and Caution Measure
2.3.2. The Instrument for Data Collection and Pre-Testing
- rate the importance of each main attribute with respect to the image of an FFR based on a nine-point Likert scale (Section B),
- rate the importance of each sub-attribute with respect to its main attribute based on a nine-point Likert scale (Section C), and
- rate the performance of each FFR under evaluation with respect to each sub-attribute based on a nine-point Likert scale (Section D).
2.3.3. Mode of Data Collection
2.3.4. Sample Size
2.4. Application of Compromised Analytical Hierarchy Process
- Type of input data required: in C-AHP analysis, the type of input data required, i.e., preference ratings, were able to be quickly offered by the respondents, mainly because they were not required to compare all the possible pairs of elements. Note that in the original AHP, the type of data needed, i.e., pairwise preference ratings, is not easy to provide since some may keep bothering about the consistency of their judgment while comparing the elements.
- The amount of input data required: in original AHP, to develop a comparison matrix involving elements, amount of input data is required from a respondent. However, for the case of C-AHP, only amount of data were needed.
- Step 1—The ratings provided by each respondent via the questionnaire were converted into proper pairwise matrices using Equation (1). In exact, firstly, the ratings from Section B were utilized to derive the pairwise matrix comparing the main attributes vs. the image of an FFR. Meanwhile, the ratings from Section C were converted to pairwise matrices comparing sub-attributes vs. their respective main attribute. Finally, the ratings from Section C were converted to pairwise matrices comparing sub-attributes vs. their respective main attribute. Table 2 illustrates better how the ratings from one of our experts in Section B of the questionnaire were converted into a complete pairwise comparison matrix using (1). Equation (2) is the general form of a pairwise matrix. Note that one important feature of a pairwise matrix is that if an element compared to is , then the value of compared to should be the reciprocal of i.e., .
- Step 2—The pairwise matrices resulting from each respondent were then recorded into the Expert Choice system [89], a piece of software specially designed to perform AHP analysis to calculate the local weight of main attributes (local weight of a main attribute refers to its relative importance in determining the overall image of a FFR), the local weight of sub-attributes (local weight of a sub-attribute refers to its relative importance with respect to its main attribute) and performance scores (performance scores refer to the performance of an FFR with respect to all the sub-attributes) of each FFR. Figure 3 is the screenshot displaying the hierarchical model of the problem at hand, as recorded in the Expert Choice environment; Figure 4 is the section in the system where the pairwise comparison values were recorded.
- Step 3—Step 1 and 2 were repeated based on the responses from each respondent.
- Step 4—The final local weight of main attributes, the local weight of sub-attributes, and performance scores of each FFR were determined by averaging the results from every respondent.
- Step 5—The aggregated image score of each FFR was computed by synthesizing the global weights (global weight of a sub-attribute indicates its overall importance in the entire decision system) of sub-attributes and performance scores of the FFR using the weighted average Equation (2), where the global weight of a sub-attribute is determined by multiplying its local weight with the local weight of the respective main attribute. The FFRs were then ranked based on these aggregated image scores, divided by subheadings. It should provide a concise and precise description of the experimental results, their interpretation, as well as the experimental conclusions that can be drawn.
2.5. Design of the Proposed Hybrid MADM Method
- The inclusion of modified Delphi allows us to integrate feedback from experts with different experience levels; thus, a well-agreed set of FFR image attributes can be determined.
- The modified Delphi survey supports us to reach a quicker consensus on the FFR image attributes since the survey begins with closed-ended questions (not open-ended questions).
- C-AHP helps us sidestep an unacceptable degree of inconsistency in a pairwise comparison matrix, thus avoiding the possible wastage of time and resources used for data collection.
- C-AHP requires fewer input data from the respondents than the classical AHP (see Section 2.4 for more details).
- The type of input data required by C-AHP can be provided more quickly since the respondents do not have to worry much about the issue of inconsistent comparisons (see Section 2.4 for more details).
3. Results
3.1. Identification of FFR Image Attributes through Literature and Delphi Survey
- Variety of foodSulek and Hensley [90] revealed that offering a wide range of food would help to increase customer satisfaction and directly increase customer retention. They also mentioned that improving the readily available menu (e.g., adding seasonal fruits) will be a good add-up. Above all, Jin et al. [91] reported that offering various menu options such as a healthy food option or vegetarian foods will help satisfy the customers’ food needs, and the image of the restaurants will ultimately be improved. Hence, as suggested by the experts involved in the Delphi survey, the food variety was considered one of the process sub-attributes.
- Operation timeKara et al. [92] mentioned that the business hour of a restaurant is one of the factors that could affect customers’ decision on going to the place. For example, if someone is working till a late hour, they will prefer to find a 24 h operating restaurant for dining purposes [93]. More importantly, based on the research conducted by Wong and Yu [94], it can be claimed that late closing hours can influence the image of a restaurant due to the significant change in the people’s lifestyle who may have to dine at late night. Therefore, as suggested by the experts, the operating time was noted as one of the process sub-attributes.
3.2. Demographic Characteristics of Respondents
3.3. Results of C-AHP
3.3.1. The Weights of Main and Sub-Attributes
3.3.2. Performance Scores of FFRs
- FFRs vs. hospitality
- FFRs vs. employees’ knowledge
- FFRs vs. employees’ problem-solving skills
- FFRs vs. taste of food
- FFRs vs. healthy food
- FFRs vs. service response time
- FFRs vs. sales promotion
- FFRs vs. value for money
- FFRs vs. food variety
- FFRs vs. operation time
- FFRs vs. menu design
- FFRs vs. employees’ appearance
- FFRs vs. physical cleanliness
- FFRs vs. parking
- FFRs vs. internal ambiance
- FFRs vs. overall safety
- FFRs vs. exterior
3.3.3. Overall Image Scores and Ranking of FFRs
4. Discussion
4.1. Discussion on the Dominant and Non-Dominant Sub-Attributes
4.2. Discussion on Possible Strategies for Improving FFR Image
5. Limitations and Recommendations
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Preference Value | Interpretation |
---|---|
1 | are equally preferred |
2 | |
3 | |
4 | |
5 | |
6 | |
7 | |
8 | |
9 | |
1/2 | |
1/3 | |
1/4 | |
1/5 | |
1/6 | is less strongly to very strongly preferred than j |
1/7 | is less very strongly preferred than j |
1/8 | is less very strongly to extremely preferred than j |
1/9 | is less extremely preferred than j |
Main Attribute | Rating | Pairwise Matrix | |||
---|---|---|---|---|---|
7 | 1 | * | 2 ** | ||
8 | 2 | 1 | 3 *** | ||
6 | ½ | 1/3 | 1 |
No. | Criterion | Classical AHP | Hybrid of Classical Delphi and Classical AHP | Proposed Hybrid of Modified Delphi and C-AHP |
---|---|---|---|---|
1 | Does the method help determine FFR image attributes that the experts mutually agree on? | (D) No, because the method is not integrated with the Delphi survey | (A) Yes | (A) Yes |
2 | Does the method allow us to reach a quicker consensus on FFR image attributes? | This criterion is not applicable due to the absence of Delphi survey | (D) Not possible since the Delphi survey begins with open-ended questions | (A) Yes |
3 | Does the method guarantee pairwise comparisons with an acceptable degree of inconsistency? | (D) No | (D) No | (A) Yes |
4 | Amount of input data required for a pairwise comparison matrix with n number of elements to compare | amount of input data. | amount of input data. | amount of input data. |
5 | Complexity in providing the type of input data required for a pairwise comparison matrix | is large | is large | is large |
Main Attribute | Sub-Attribute | Description | Source |
---|---|---|---|
People | Hospitality | The staff are friendly, willing to help the customers, and have an excellent courtesy and response manner. | [36,52,92,95,96] |
Employees’ Knowledge | The staff serve the food exactly as orders made by customers, and they can provide all the information about their service to the customers. | [36,95,96] | |
Employees’ problem-solving skills | The staff are trustworthy. They apologize for the mistake and can deal with complaints. | [95,97] | |
Process | Taste of food | A standardized set of items that taste the same at any point of time. | [36,38,52,57,59,91,96,97,98,99,100] |
Healthy food | The food is hygiene, nutritious and fresh. The restaurant uses proper food storage, handling, and preparation process to maintain the hygiene, nutrients, and freshness of the fast-food items. | [101,102] | |
Service response time | Quick service and minimum waiting time. | [52,103,104] | |
Sales promotion | The FFR efficiently deliver messages about the available sales promotions, e.g., coupon & discounts. | [105] | |
Value for money | Money paid is worth the speediness involved in the process of preparing and serving the food after an order is made. | [106] | |
Physical evidence | Menu design | Clear descriptions, clear pictures of food items, price tags are displayed, and informative menu design. | [107,108] |
Employees’ appearance | Employees have a professional appearance, neat and well dressed. | [36,38,91,95] | |
Physical cleanliness | Clean dining environment. | [36,38,52,57,59,92,95,96,97,99] | |
Parking | The restaurant has a convenient parking location and sufficient parking space. | [92,95,96,99] | |
Internal ambiance | Internal seating facilities, nice interior design & décor, nice music, restaurant decorations, lighting, layout, appropriate room temperature, good atmosphere, and having adequate space. | [36,38,57,59,91,92,96,109] | |
Overall safety | The restaurant is equipped with all the necessary safety features such as CCTVs, fire extinguishers, and emergency exits. | [52,110,111] | |
Exterior | Pleasant outward appearance and scenery around the restaurant. | [91,96,112,113] |
Main Attribute | Sub-Attribute | Mean | CV (%) |
---|---|---|---|
People (Mean = 4.82, CV = 8.40%) | Hospitality | 4.91 | 6.14 |
Employees’ knowledge | 5.00 | 0.00 | |
Employees’ problem-solving skills | 4.64 | 10.88 | |
Process (Mean = 4.91, CV = 6.14%) | Taste of food | 5.00 | 0.00 |
Healthy food | 5.00 | 0.00 | |
Service response time | 4.82 | 8.40 | |
Sales promotion | 4.64 | 14.54 | |
Value of money | 4.64 | 10.88 | |
* Variety of food | 4.82 | 8.40 | |
* Operation time | 4.82 | 8.40 | |
Physical evidence (Mean = 4.82, CV = 8.40%) | Menu design | 4.91 | 6.14 |
Employees’ appearance | 4.91 | 6.14 | |
Physical cleanliness | 4.91 | 6.14 | |
Parking | 4.00 | 17.95 | |
Internal ambiance | 4.82 | 8.40 | |
Overall safety | 4.91 | 6.14 | |
Exterior | 4.91 | 6.14 |
No. | Sub-Attribute (Global Weight) | Possible Strategies |
---|---|---|
1 | Hospitality (0.118) | |
2 | Employees’ problem-solving skills (0.116) | |
3 | Employees’ knowledge (0.101) | |
4 | Food taste (0.060) | |
5 | Physical cleanliness (0.059) | |
6 | Service response time (0.052) |
|
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Krishnan, A.R.; Hamid, R.; Lin, R.Y.S.; Tanakinjal, G.H.; Rathakrishnan, B. Making Informed Decisions to Improve Restaurant Image Using a Hybrid MADM Approach: A Case of Fast-Food Restaurants in an Island of East Malaysia. Information 2022, 13, 219. https://doi.org/10.3390/info13050219
Krishnan AR, Hamid R, Lin RYS, Tanakinjal GH, Rathakrishnan B. Making Informed Decisions to Improve Restaurant Image Using a Hybrid MADM Approach: A Case of Fast-Food Restaurants in an Island of East Malaysia. Information. 2022; 13(5):219. https://doi.org/10.3390/info13050219
Chicago/Turabian StyleKrishnan, Anath Rau, Rizal Hamid, Ronia Yeap Siew Lin, Geoffrey Harvey Tanakinjal, and Balan Rathakrishnan. 2022. "Making Informed Decisions to Improve Restaurant Image Using a Hybrid MADM Approach: A Case of Fast-Food Restaurants in an Island of East Malaysia" Information 13, no. 5: 219. https://doi.org/10.3390/info13050219