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Assessment of service quality in a la carte restaurants within the mega city of Istanbul: A mystery shoppers’ study Cover

Assessment of service quality in a la carte restaurants within the mega city of Istanbul: A mystery shoppers’ study

Open Access
|Aug 2025

Figures & Tables

Figure 1:

Map of the northern region of Portugal.
Map of the northern region of Portugal.

Interaction Quality (IQ) Assessment

Management QualityControl
123
M±SDM±SDM±SD
FDR2.47±1.253.89±1.154.57±1.30
TR2.83±1.153.73±1.143.49±1.15
LR2.55±1.103.45±1.053.10±1.11
Kruskal Walls HX221.30333.66132.175
p0.0000.0000.000
FriedmanX2 979.035
p 0.000

Business Operation information

Business OperationsOptionsFDRTRLRTOTAL

n%n%n%n%
A’la carte service mealJust dinner6671.03228.61514.211336.3
Lunch & Dinner2223.67163.454.79831.5
All of them55.498.08681.110032.2

Guest profileLocal guests1010.87365.27267.915549.8
Foreign guests2425.81210.721.93812.3
Both of them5963.42724.13230.211837.9

Culinary preferences of foreign guestsTurkish cuisine2830.17365.2106100.020766.6
Foreign cuisines1819.3119.800.0299.3
Both of them4750.62825.000.07524.1

The culinary preference of local guestsTurkish cuisine3840.97365.2106100.021769.8
Foreign cuisines2021.5108.900.0309.6
Both of them3537.62925.900.06420.6

TOTAL9329.911236.010634.1311100.0

Physical Environment Assessment

Management QualityControl
123
M±SDM±SDM±SD
FDR3.74±1.234.37±0.924.30±0.96
TR2.82±1.203.66±1.173.42±1.18
LR2.34±1.222.91±1.312.58±1.27
Kruskal Walls HX2221.921259.730336.944
p0.0000.0000.000
FriedmanX2 793.741
p 0.000

Measurment Model

ConstructEFAEVt-valuespCAAVE
IQ 56.7 .890.672
IQ1.771 fix***
IQ2.758 43,529
IQ3.730 30,644
PEQ 57.9 .930.710
PEQ1.901 fix***
PEQ2.682 28,982
PEQ3a 29,360
PEQ4.909 26,744
MQ 59.1 .920.719
MQ1.945 29,930***
MQ2a fix
MQ3b 34,179
MQ4.945 25,742***
OQ 74.4 .950.725
OQ1.937 21,363
OQ2a fix
OQ3.931 21,528***

Output Quality Assessment

Output QualityControl
123
M±SDM±SDM±SD
FDR4.44±0.824.72±0.474.69±0.55
TR2.60±1.083.27±1.023.41±1.20
LR2.09±1.432.73±1.322.64±1.38
Kruskal Walls HX2388.656391.208343.686
p0.0000.0000.000
FriedmanX2 548.971
p 0.000

Business information

Business InformationOptionsn%
Restaurant TypeFDR9329.9
TR11236.0
LR10634.1

Ownership StructureChain16352.4
Independent14847.6

Year of Service< 1196.1
1–46219.9
5–97122.8
10–1411035.4
15–193410.9
> 20154.8

Management style (By...)The boss(es)12339.5
Department heads13342.8
Professional CEO5517.7

Number of BranchesNo10132.5
2–1010935.0
11–256621.2
> 263511.2

Number of Personnel (people)< 10185.8
10–4912740.8
50–997624.4
100–1495818.6
150–199258.0
> 20072.3

Management Quality (IQ) Assessment

Management QualityControl
123
M±SDM±SDM±SD
FDR3.74±1.144.39±0.934.27±0.97
TR2.59±1.133.58±1.103.28±1.05
LR2.45±1.123.31±1.142.72±1.16
Kruskal Walls HX2180.395156.274244.322
p0.0000.0000.000
FriedmanX2 810.226
p 0.000
DOI: https://doi.org/10.2478/ejthr-2025-0012 | Journal eISSN: 2182-4924 | Journal ISSN: 2182-4916
Language: English
Page range: 167 - 182
Submitted on: Jun 12, 2024
|
Accepted on: Sep 30, 2024
|
Published on: Aug 14, 2025
In partnership with: Paradigm Publishing Services
Publication frequency: 2 issues per year

© 2025 Ümit Sormaz, Neslihan Onur, Gürkan Akdağ, Mustafa Yılmaz, published by Polytechnic Institute of Leiria
This work is licensed under the Creative Commons Attribution 4.0 License.