MINISTRY OF EDUCATION AND TRAINING
NATIONAL ECONOMICS UNIVERSITY

THE RESEARCH WORKS COMPLETED AT
NATIONAL ECONOMICS UNIVERSITY

Supervisors:

NGUYEN XUAN HAO

Assoc. Prof. Dr. DANG DINH DAO

Judge 1: Assoc. Prof. Dr. Le Anh Tuan

THE IMPACTS OF LOGISTICS SERVICES ON BUSINESSES
OPERATION’S EFFICIENCY OF MANUFACTURING
ENTERPRISES IN QUANG BINH PROVINCE

Judge 2: Prof. Dr. Dinh Van Tien

Judge 3: Dr. Nguyen Thanh Hieu

Major: Commerce Business (Economics and Trade Management)
Code: 62 31 01 21

The doctoral thesis shall be defenced in front of the Doctoral Thesis
Assessment Board at level..........
on ...............................................
At: ……… Day …… month … year 2015

SUMMARY OF DOCTORAL THESIS IN ECONOMICS

basic factors / of logistics services which impacts on the efficiency of BO of MO;
(iii) Conclusions related to both qualitative and quantitative aspects of the logistics
services impact on the BO’s efficiency of ME in Quang Binh province; (iv)
Suggesting directions and solutions of logistics services to enhance the business
operation’s efficiency of the manufacturing enterprises of Quang Binh province,
along with a number of proposals to create environment and conditions to
implement the objectives of the given solutions
2. Rationale of the research
After nearly 30 years of innovation and integration, Vietnam has gained very
important achievements in the fields of socio-economic life in which the
innovation of points of view and economic policies making positive and powerful
changes to goods market and services . Along with the country, Quang Binh’s
economy keeps on growing positively, technology science is applied into the fields
of production and business actively, such as: construction, transportation,
commerce, warehouse services, customs services, distribution services, ... The
types of services, especially logistics services has developed with more and more
diversity and variety [8]. Logistics services play an important role in helping to
improve the management efficiency, minimizing business costs and enhancing the
competitive competence in order to solve both inputs and outputs of every
enterprise [8],[11],[15].. Accordingly, logistics services will have extremely
positive impact on BO of ME in Quang Binh province.
Logistics services are a commercial operation, whereby traders organize to
carry out one or more tasks including receiving distribution goods, storing,
warehousing, doing customs procedures and other paperwork procedures,
consulting customers, packaging, marking code, delivering goods or other services

involved in commodity agreed by customers to receive remuneration. Logistics
services spelled in Vietnamese is "Lo-gi-stic" service [25]
In the context of international economic integration, Vietnam has been
implementing commitments of opening market service (from 2013 with the

David and Richard D Pierre Stewart, 2006); International Logistics (Donald F.
Wood, Anthony Barone, Paul Murphy and Daniel L. Wardlow, 2002); Reverse
logistics (Nguyen Van Ha, 2010); Global Logistics Management: A Competitive
Advantage for the 21st Century (Kent Gourdin, 2006); Essentials of Supply Chain
Management, 2nd Edition (Michael H. Hugos, 2006); Strategic Supply Chain
Management (Shoshanah Cohen and Joseph Roussel, 2005); Management of
Business Logistics: A Supply Chain Perspective (John J. Coyle, Edward J. and C.
John Langley Bardi, 2002); Streamlined: 14 Principles for Building & Managing
the Lean Supply Chain (Mandyam M. Srinivasan, 2004); Logistics Engineering &
Management (Benjamin S. Blanchard. Prentice Hall, 2003); Logistics: Principles
and Applications (John Langford, 2006); Integrated Logistics Support Handbook
(James Jones, 2006);
Logistics services were studied by many authors under the perspective or
some specific areas, with the following typical work: The Relationships Among
Supply Chain đặc, logistics and manufacturing strategies, and performance
(Elisabeth Angelisa Gillyard, 2003) ; The impact of logistics strategy and logistics
processes on service performance information technology (Katrina P. Savitskie,
2003); Inbound Logistics as a source of competitive Advantage (Steven A.
Samaras, 2000).
To guide practice for the transport and logistics, there are works: A Practical
Guide to Transportation and Logistics (Michael B. Stroh, 2006); (2) Transport
Logistics: Past, Present and Predictions (Issa Baluch, 2005).
Although, there were many domestic and abroad works studying about the
logistics, but the problem goes deeper to the impact of logistics services on
improving the BO’s efficiency of ME and specifically in Quang Binh province, up
till now there has been no study published yet.

4. Research purposes
The overall objective of this research is studying and proposing system of
solutions to enhance the positive impacts and limit the negative impacts of

services are services related to entire ensuring operation of production and
business process including the provision of inputs to the sale of products,
organized ME by themselves or outsourced that have an impact on the business of
each enterprise in the market.
1.1.2. Classification and characteristics of logistics services
1.1.2.1. Classification of logistics services[15], [11], [37].
Classification of logistics services is carried out according to the field with
logistics services in production business and logistics services in the events;
according to bỏ the exploitation of logistics operations with 1PL, 2pl, 3PL, 4PL;


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according to bỏ specialization including enterprises providing transport logistics,
distribution, goods and services of specialized logistics services; the
implementation process including inbound, output and recovery logistics goods
subject with logistics, goods in a short shelf life, automotive logistics ...
1.1.2.2. Characteristic of logistics services [8], [45], [57]
(1) Logistics services are not only a single activity but also a series of
activities covering the manufacturing of products and the ship to customers; (2) A
interdisciplinary commercial activity including many activities managed by many
ministries and branches concerned; (3) Attached to all stages of the production
process; (4) As the active support of businesses; (5) As a complete, highly
development of transport delivery service ; (6) As the complete development of
multimodal transportation services; and (7) The effect is based on the full use of
IT achievements.
1.1.3. The basic operations and relationships with BO’s efficiency of ME
1.1.3.1. The basic logistics operations that affect the BO’s efficiency of ME [5],

higher economic efficiency is.
• The profit of ME (P - Profits) [1]:
P = S - C (1.1)
b) Group of criteria assessing BO’s efficiency.
• (ROS – Return on Sales) [63].

H=

K
C

[30], [33]

In which: H is BO’s efficiency of ME; K is the finding earned from BO and C
is the cost used to achieve that finding.

ROS =

P
S

(1.2)

S is sales in the period.

ROS shows how much profit of net income an ME makes after paying
for taxes.
• (ROC – Return on Cost) [1], [63].
ROC =


(1.5)

1.2.2. The impacts of logistics services on BO’s effieciency.
1.2.2.1. The main elements of logistics services impact on BO’s effieciency [73]
(1) The quality of logistics services;
(2) the delivery of logistics services;
(3) The flexible element of logistics services;
(4) The price logistics
1.2.2.2. The impact of logistics services on saving cost of ME
Factors of logistics services have a positive impact on saving logistics cost and
business cost in general, specifically they have a positive impact on optimizing the
flow of inputs and outputs of ME from production preparation to products
distribution to final consumers [8].


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1.2.2.3. The impact of logistics service on revenue growth of ME
Logistics services contributed positively to orient the market and improve the
ability of product consumption for ME.
1.2.2.4. The impact of logistics services on the BO’s efficiency of ME
Using outsourced logistics services ensures the work always operated punctually and
qualitatively; contributing to improve the management efficiency and reduce costs in the
production process, enhance the competitiveness of enterprises [8].
1.3. Opening markets of logistics services and the opportunities, challenges
for manufacturing enterprises
1.3.1. An overview of the process of integration and opening services markets
Markets, trade and services are developed constantly with fast speed[19];

development of logistics services;
(3) Creating opportunities for partnership development, export markets, the

approach of finance and credit
(4) Having more opportunities to approach new scientific and technological
achievements, advanced management methods.
1.3.4.2. The challenges for ME when opening logistics market.
(1) The benefits of market opening of logistics services are little;
(2) The selection of supplier logistics service providers are still confused and ineffective;
(3) The use of logistics services from foreign providers has difficulties;
(4) Human Resources for logistics have not met the reqirement.;
(5) The logistics still contains many risks.
1.4. The research method.
1.4.1. Theoretical framework and research process.
1.4.1.1. Theoretical framework
Based on a review of the domestic and abroad the works, the thesis gave the
following researched theoretical framework (Figure 1.1):
Logistics services
- The nature of logistics services
- The types of logistics services
(1PL, 2PL, 3PL,..).
- The role of logistics services in
BO.

The efficiency of ME
- The criteria to assess the
efficiency: ROS, ROC,...
- The degree of impact on the
efficiency of logisticsservices..


Specifying the
logistics services
status for ME in
Quang Binh province

Analyzing, evaluating
the impact of logistics
services on BO's
efficiency of ME in
Quang Binh province.

Figure 1.2: The study process of the impact of logistics services on BO's
efficiency of ME
1.4.2. Developing the research models
Developing and giving model of the basic elements of logistics services
impacts on BO's efficiency of ME in Quang Binh province as follows:


9
Service quality of the
suppliers of materials and

+

Service quality of
distributors

+

Service quality of the other

BO’s efficiency of ME in Quang Binh province
Source: Aggregated fellows [8],[15], [73].
1.4.3. Scale Development
The thesis used the available scale [68].
1.4.4. Research sample
The survey sample is selected by non-random methods combining with
categorized by geographical areas methods , selected from the overall study ( all
manufacturing enterprises in Quang Binh province). The size of survey sample is
185. Objects surveyed are ME in business operation in districts, towns and cities
of Quang Binhprovince.
1.4.5. Data collection method
1.4.5.1. Methods of gathering secondary data: Searching, selecting and classifying
documents, scientific works unpublished in domestic and abroad related to
logistics services impacts on BO's efficiency of ME. Also using the evaluation
standpoint, judgment of experts, logistics researchers and enterprise’s efficiency.
1.4.5.2. Methods of collecting primary data: Primary data collected from the
survey sample by the method of direct survey on objects through questionnaires.
Implementation period of 03 months (fourth quarter/ 2013).
1.4.6. Data processing method
1.4.6.1. Data processing method: After collecting sufficient primary and secondary
data, proceeding to checkout, cleaning data before, while and after coding and
entering data Then, using 16 SPSS software as a tool for data processing.
1.4.6.2. Data analysis method: The thesis uses descriptive statistical methods;
Inspecting of those factors,the reliability and multiple regression analysis.

2.1. Natural - economic - social Natural, economic and social features, logistic
services and the BO’s efficiency of ME in Quang Binh province
2.1.1. Natural - Economic - Social features in Quang Binh province
2.1.1.1. Natural features affect the BO’s efficiency of ME
Located at between 16055'12'' to 18005'12'' north latitude and 105036'55'' to

for 3.00 thousand workers, including creating new jobs for 2 thousand workers;
GDP per capita at the current market price reached $ 1,080 người [4].


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2.1.3. The development of logistics services in Quang Binh
affects the
efficiency of business operation of ME
2.1.3.1. Transport services of technical materials and manufacturing products
Based on survey results, over 77% of respondents said that transport volume
is not large, mainly transported one way; not guaranteed on time; having high
transport costs; being unsafe for goods and customers; backward means of
transport. The logistics services have not been developed at the same time and
diversified, so ME rarely use outsourced logistics services, and they often have to
undertake the transport services inputs input transport services for production,
even in consuming products. These causes make the shipping cost of technical
materials and manufacturing products highly increase affecting the BO’efficiency
of ME in province.
2.1.3.2. Services of delivering and receiving goods
According to survey results, the volume of outsourced logistics services,
warehousing of ME in Quang Binh is only about 15%, the rest is self-organizing
to invest vehicles or selfmade. The cost of delivering and receiving goods is still
high, airport charge is too high (4.84 points), and negative charge (3.93 points),
... This has had a negative impact on logistics costs as competition and market
expansion of ME Binh Quang Binh province.
2.1.3.3. Warehouse Services
The capacity and use of the warehouse of ME in Quang Binh have not met

Most ME undertake lassification and packaging of goods, the rest rents
logistics businesses. This service is mainly done in Hon La, Gianh, Nhat Le ports
and commercial centers in the province.
2.1.3.8. Information Technology Services
According to the survey results, 69.7% of enterprises have been equipped
sites with websites, 56.6% of them have been equipped with cargo tracking
systems, besides 8.4% of them have been equipped with barcode systems (BCS),
and only 2.6% of them have been equipped with IT for transport mannagement
system (TMS) and warehouse mannagement system (WMS).
2.2. Descriptive statistical analysis of the impact of logistics services on the
BO’efficiency of ME in the province of Quang Binh
2.2.1. Logistics services impact on the reasonable use and saving of resources,
reducing costs in the production process
The survey results, over 97% of the opinion that the use of external logistics
services(transportation, freight forwarding, warehousing and customs) would reduce
logistics costs from 16% to 30%. Thus, the service has helped reduce manufacturing
enterprises logistics cost in clearance work and shorten the time of operation of its import
and export, and accelerate the speed to take the goods to the place of consumption.
2.2.2. Development of logistics services with enhanced impact competitiveness,
promote consumption of the products manufacturing enterprises
Results survey on the impact of logistics services to the turnover of
manufacturing enterprises in the province of Quang Binh is very positive: over 96%
of the opinion that the use of outsourced logistics services (transport , forwarding and
warehousing) will increase from 16-30% in revenues; 98.68% suggested that using
customs services outsourcing revenues will increase to over 30%.
2.2.3. Logistics services actively support elements and place on time (JIT),
ensuring that the production process is carried out smoothly and continuously
The masters of manufacturing enterprises in Quang Binh assess logistics
services supporting effective and positive for them in a matter of time and place,
to ensure growth of the business ROA and ROS. The reviews focused agree to use

The BO’s effectiency of ME in Quang Binh province in master thesis is
considered primarily by two scales or two dependent variables: (i) Rate of return
on net (ROS), in model 1, va (ii) Rate of return on costs (ROC) in model 2.
2.3.3.1. The impact of logistics services to ROS - Model 1
Model 1: Testing of the relationship between the six factors of logistics
services with margin on sales (ROS).
The regression results presented in detail Appendix 4.1, synthesis results in
Table 2:16 shows the regression equation are significantly smaller at p
ROS = β 0 + β 1 X 1 + β 2 X 2 + β 3 X 3 + β 4 X 4 + β 5 X 5 + β 6 X 6 + ε

ROS: The dependent variable; Xi ( i =1, 6 ): The independent variable; β 0 :
Coefficient of freedom; β i : Regression coefficient between independent variables
and the dependent variable; ε : Random error.
2.3.1.2. Model 2 has a multiple regression equation:
ROC = β 0 + β1 X 1 + β 2 X 2 + β 3 X 3 + β 4 X 4 + β 5 X 5 + β 6 X 6 + ε

ROC: The dependent variable; Xi ( i =1, 6 ): The independent variable.
2.3.2. The rating scale independent variables of the model
2.3.2.1. Rating distribution format scale independent variables
The scale X1-quality service of providers of raw materials, X2-quality
service of distributors, X3-quality service of other logistics services providers,
X4-level reliability of using outsourced logistics services, X5-level of using basic
services X6-level of using steadly increasing services with normal distribution,
ensuring the requirements of the next inspection.
2.3.2.2. Assessing the value of the independent variables of the model
As a result, EFA obtained 28 observation variables, quoted 6 elements in
"Initial eigenvalues"> 1. The total variance explained that when the group was
drawn and elements are greater than 50%. Following factors have observed
variables and download a corresponding independent value that guarantees
required Loading factor> 0.3.
2.3.2.3. Assessing the reliability of the independent variables of the model
Table 2:15: The reliability of the independent variables
Variable
Explanation
Cronbach’s Alpha
X1
Service quality of suppliers of materials and supplies
0,790

According to the regression equation, when the service quality of suppliers of
materials and supplies increased (decreased) by 1%, the ROS would increase
(decrease) in average 0.879%. When the service quality of distributors increased
(decreased) by 1%, the ROS would increase (decrease) in average 0.476%. When
the service quality of other service providers increased (decreased) by 1%, the
ROS would increase (decrease) 3,758% average. When the confidence level of
using outsourced logistics services increased (decreased) by 1%, the ROS would
increase (decrease) in average 2.043%. When the extent of using the basic
logistics services increased (decreased) by 1%, the ROS would increase (decrease)
in average 0.664%. When using the service level of logistics increase (decrease)
by 1%, the ROS would increase (decrease) 1,052% average.
Thus, this result confirmes all six elements of the quality and level of using
and usage of logistics services are affecting the BO’s efficiency of ME in Quang
Binh. In particular, factors X3 - service quality of service providers has the biggest
impact level (= 3,758), followed by the element X4 - level of trusted outsourced
logistics services (= 2.043), factor X2 - service quality of the distributors has the
smallest impact level (= 0.476).

2.3.3.2. The impact of logistics services on ROC - Model 2
Model 2: Testing the relationship between the six factors of logistics services
with profit margin on costs (ROC).
The regression results presented in detail Appendix 4.2, synthesis results in
Table 2:17 shows that the regression equation is significantly smaller at p
Source: The survey of the author

Service quality suppliers
materials
Service quality of
distributors
Quality of service providers
other logistics services
Confidence level of using
outsourced logistics services
Level of using basic logistics
services
Levels of using increased
logistics service

0,879*

0,476*

3,758

***

R2 = 0,939
The BO’s efficiency of ME
(Rate of return on net sales)

2,043***

0,664***

(decrease) average of 0.684%; When using level of logistics service increase
(decrease) by 1%, the ROC will increase (decrease) average of 2.149%.
Thus, the results have confirmed there are five elements of the quality and level
of using logistics services are affecting the BO’s efficiency of ME in Quang Binh
province. In particular, factors X3 - service quality of other service providers impact
the most ( β 3 = 4.458), next the factor X6 - the level of using logistics services
increase ( β 6 = 2.149), factors X5 - the level of using the basic logistics services has
the smallest impact level ( β 5 = 0.684).

improve the technical level of production, improving technological processes, thus
it makes the products produced have better quality, reduce costs and gradually
improves the competitiveness in the market.
- The development of logistics services (logistics inputs, outputs and other
logistic services) have actively supported for many manufacturing enterprises in
the province to expand and take over the market of products .
- In terms of integration, open markets, logistics services have helped
businesses in Quang Binh province access to foreign markets, improve the
qualifications and skills in business administration. Thereby it helps reduce the
cost of production and business,a more important thing is that it always guarantees
for the production of enterprises to conduct smoothly and continuously without
interruption.
- Thanks to the elements of well-improved logistics services , it is the service
quality of suppliers of raw materials, distributors and suppliers of other logistics
services (transport, logistics, warehouse yards, customs, ...) helped the
manufacturing enterprises in the province of Quang Binh trust more, the level of
using outsourced logistics services gets higher. Therefore, the elements of
outsourced logistics services have a directly positive impact
on reducing
logistics costs, increase revenue, increase ROS (resulting regression model 1) and
ROC (regression results model 2) of the ME in Quang Binh province. (See Annex

Quality of service providers other
logistics services

4,458***

Confidence level using outsourced
logistics services

1,840**

R2 = 0,949
The BO’s efficiency of
ME
(Rate of return on net

Level using basic logistics services

Levels using increased logistics
Service

0,684***

2,149***

Chart 2.2: The impact model of logistic services to ROC (model 2)
2.4. The general evaluation through studies impact of logistics services on the
BO’s efficiency of ME in Quang Binh province
2.4.1. Result
- Logistics services in Quang Binh have gradually grown in both content and
form of service, which has had very positive effects to BO of all businesses,

commensurately with its potential.
(6) The organization of the economic relationships in logistics service
business has underdeveloped, most of the logistics service providers in Quang
Binh have not established service provision relationships long-lasting, the
development of all kinds of logistic services primarily in short, having no longterm strategy makes ME have a bias towards undertaking logistics services in both
input and output, having no logistics supplies optimization to manufacture and
supply products to customers, from which affect Bo’s efficiency of enterprise
itself, the competitiveness of products and goods of ME in Quang Binh province
is limited.

3.1.2. Requirements and prospects of logistics services in improving the BO’s
efficiency of ME in Quang Binh province
3.1.2.1. Requirements for logistics services
Need to develop logistics services to promote the role in promoting economic
-social development, and environmental protection for ME and local.
3.1.2.2. Prospects of logistic services development in Quang Binh province - an
important element to improve the BO’s efficiency of enterprises
The investment development of business infrastructure and logistics; Training
human resources for logistics operations;
The renewal of commodity trading methods and extension of service types;
The development of logistics service providers; Supply and demand for
export production;
Enhancing and improving management effectiveness of PPC for logistics
operations in the area;
Competitiveness of some key commodities of Quang Binh province and
improving quality, reducing logistics costs;
Improving organization and management of logistics operations;
Development prospects of commodity markets and logistics services.
3.2. The direction of strengthening the positive impact of logistics services on
the BO’s efficiency of ME in Quang Binh province

Binh province up to 2020 and prospects of logistics service to enterprises
3.1.1. Objectives and directions of socio - economic development of Quang Binh
province up to 2020
The goal, direction is evident in social-economic development planning in Quang Binh province by 2020,it is in line with the strategy of social- economic
development - the country's social, overall planning of economic development in
central coastal strip and the North Central region; also ensuring uniformity,
consistency with the sector planning and local fields.


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enterprises in the model of function orientation and integrated model [28];
The implementation of logistics services must be unified, with the support
among the different parts of the enterprise;
Deviding responsibilities clearlyt among each department but it must agree to
ensure the quality of the implementation of this service.
3.3.1.2. Investment Solutionsof facilities, modern equipment for logistics
operations in ME.
3.3.1.3. Solutions of accelerating the application of information technology in
managing logistics operations.
3.3.1.4. Enhancing the reputation and brand development and new management
models in logistics management
It is essential to strengthen the advertisement of enterprise’s image through mass
media, newspapers, radio, TV, internet; the activities of public relations PR (Public
Relations);
It is essential to boldly apply the new management model in governing
functional logistics and integrated model.
3.3.1.5. The solutions involve in input logistics for the production of businesses

The logistics businesses must perform venture, link to set up a joint venture
enterprises, or sell shares to foreign partners.
3.3.2.4. Solutions of improving the quality and competitiveness of logistics services
(1) Overcoming the weaknesses of the logistics businesses in the province;
(2) Enhancing cooperation, linking the logistics operations among enterprises in
the region;
(3) The logistics enterprises in Quang Binh have to exploit the potential and
available advantages (geographical location, traffic, advantage product) to create
distinct competitive advantage.
3.3.3. The measure groups of establishing reasonable economic relations among
the businesses
3.3.3.1. Strengthening links, cooperating with businesses in the region and the
world
3.3.3.2. Restructuring ME and logistics enterprises in the province
Through the merger, cooperation links among businesses in the sector with
ablity to merge to form the diverse and professional logisticsenterprises.
3.3.4. Solution groups for Quang Binh province and the relevant authorities
3.3.4.1. Solution groups related to logistics personnel training, taking advantages of
opportunities from opening markets of logistics services
Quang Binh timely have policies to attract, develop logistics personnel,
encouraging logistics training to meet the demand of high quality and professional
logistics personnel in both immediating and lasting.
3.3.4.2. Solutions of developing investment in logistics infrastructure
(1) The ensurace the coherence between economic development planning of
local sectors with development planning of logistics services;
(2) The investment in technical infrastructure for logistics service;
(3) Prioritizing the construction of logistics center in Quang Binh province;
(4) Concentrating the investment and development of logistics IT infrastructure
systems;
(5) The development of infrastructure and the technical means of advanced

of competition in the economy, therefore, BO’s efficiency is determinant of
survival and development for each enterprise. For ME, its operation mainly
produce with the desire of being accepted by the market to profit. Logistics
services have a very important role and a close relationship... and impact, affect on
the results and quality of the BO’s efiecincy of ME. With the set goals and tasks
for the subject, the thesis has focused on solving the basic problems of the impact
of logistics services on the BO’s eficiency of ME in Quang Binh province,
namely:
(i) To systemize the theoretical and practical issues in nature, role and
relationship of logistics services with the BO’s efiecincy of ME, the impact of
logistics services on the BO’s efiecincy of ME in condition of our country
opening services market.
(ii) By combining qualitative and quantitative research methods, based on the
survey of 185 manufacturing enterprises (earning 152 votes) in the locality of
logistics services impacts on the BO’s efficiency of ME in Quang Binh province.
The research of thesis drawed the new things and the following important
conclusions:
The thesis pointed out the limitations of logistics services by self undertaken
ME u (1PL) and that had a negative impact on BO’s eficiency of ME in Quang
Binh province.
The thesis analyzed and gave six elements of outsourced logistics services
with a positive impact on BO’s efficiency of the ME in Quang Binh province.
Simultaneously,it analyzed and quantifed the impact level of each factor through
two regression models. For model 1, three extremely positive impact factors on
ROS should be paid attention to in order are: service quality of other logistics
service providers; using belief level of outsourced logistics services, using level of
increased logistic services. In model 2, 5 elements of outsourced logistics services
impact positively on ROC following levels: service quality of other logistics
service providers; using level of increased logistic services; using belief level of
outsourced logistics services. Service quality of materials and supplies suppliers

Journal of Information and Forecasting Social -Economic Affairs, No. 108,
pp. 29- 33.
5. Nguyen Xuan Hao (2015),

The development of logistics services to

improve the efficiency of enterprises in Quang Binh, Journal of Economics
and Forecasting, No. 02, pp. 59-61.
6. Nguyen Xuan Hao , Le Van Dung, Le Thi Tham (2015), The development

of manufacturing enterprises in the field of logistics services in Quang Binh
Province, Journal of Economics and Forecasting, The thematic, pp. 35-36.