An Approach to Develop Flexible Systems
with Organizational-interoperability Requirements
Diego Fuentealba, Kecheng Liu and Weizi Li
Informatics Research Centre, Henley Business School, University of Reading, RG6 6UD, Whiteknights, Reading, U.K.
1 INTRODUCTION
Flexibility of information systems (IS) have been
studied to improve the adaption in support of the
business agility as the set of capabilities to compete
more effectively and adapt to rapid changes in
market conditions (Glossary of business agility
terms, 2003). However, most of work on IS
flexibility has been limited to systems architecture,
ignoring the analysis of interoperability as a part of
flexibility from the requirements.
This paper reports a PhD project, which
proposes an approach to develop IS with flexibility
features, considering some challenges of flexibility
in small and medium enterprises (SMEs) such as the
lack of interoperability and the agility of their
business.
The motivation of this research are the high
prices of IS in developing countries and the
usefulness of organizational semiotics to support the
analysis of requirements for IS. (Liu, 2005).
2 STAGE OF THE RESEARCH
This paper reports the work of an initial state of a
PhD project, which is the discussion of definitions of
flexibility and interoperability of IS from literature
review.
Flexibility is studied from different point of
views such as flexibility in enterprise, information
systems and software development, analysing this
lacks and applications in the IS. The literature
review has revealed that flexibility of IS affect the
agility of enterprise, because both case have pursued
the capability to adapt to rapid changes.
Additionally, the agility of enterprise is affected by
the integration between internal and external process
of business, so the interoperability of IS is reviewed
to understand how it can affect the adaptability of
the IS
After a literature review, the next step of this
stage is the analysis of flexibility in software design,
IS and enterprise, using a semiotic framework
(Stamper, 1973) to identify the impacts of each
definition between the organization and the IS.
3 OUTLINE OF OBJECTIVES
The aim of this research is to develop an approach to
design flexible information systems to support the
business agility.
In order to achieve this aim, the objectives of this
research are:
1. To propose an assessment model, which
involves the identification of the key features
of a flexible system such as level of abstraction
of flexibility.
2. To propose an approach to analyze and model
business requirements for interoperable and
flexible IS.
3. To propose an approach to analyze and design
information systems with technical components
to achieve flexibility.
4. To evaluate the approach to develop IS based
on a case study to achieve the design of a
system with flexible features.
4 RESEARCH PROBLEM
Small and Medium Enterprises (SMEs) are the
majority in Latin America and Europe. They
represent more than 99% of enterprises and around
of 30% of GDP of them. (Economic Commission for
Latin America and the Caribbean , 2013; Kushnir, et
al., 2010).
SMEs of Latin America have showed some
difficulties in their IS to support the expansion and
globalization of their business. According to the
Economic Commission for Latin America and the
Caribbean (ECLAC) (2005) the obstacles related to
the IS are: weakness of information management;
lack access to information relating to markets,
regulation and technical norms; and the high costs
36
Fuentealba D., Liu K. and Li W..
An Approach to Develop Flexible Systems with Organizational-interoperability Requirements.
Copyright
c
2014 SCITEPRESS (Science and Technology Publications, Lda.)
and slowness of trade-related procedures. According
the ECLAC, these difficulties are related with the
flexibility lack of Information systems to support the
customization of processes for:
Achieving of cooperation among SMEs: The
integration of several SMEs can provide a
virtual cluster to offer product or services that
alone cannot satisfy the customers' demands.
For instance, the cooperation needed between
delivery services and retailer companies in
order to offer products and delivery service in
only one web page.
Accomplishing of international regulations:
Although, SMEs have to follow local
regulations, each country has different norms
to sell the same products.
Integrating with large companies: Several
SMEs are providers of large companies, and
the lack of integration with their processes can
be translated in a loss of business opportunities.
In Europe, the situation is not different. SMEs do
not have much money to spend in Information and
Communication Technology (ICT) and the low cost
pre-package software has limited the agility for
innovation or business alliances. They need ICT to
support their core business, easy to upgrade and at as
low cost as possible (European Commission, 2006).
The SMEs should ensure flexible production
environment to experiment new business models in
order to respond quickly to changing markets
conditions and improve the innovation support
(European Commission, 2007).
In sum up, the current challenges of flexibility
are:
Improving of the customization of business
processes to accomplish the requirements of
partners, customers and regulations.
Encouraging the integration among
enterprises to provide a product or service.
Reducing of time to add new functionalities
or to update IS
Improving the adoption of new technologies.
Although, the first problem is how to reach the
flexibility of an information system, there are not a
standard definition of its main features, then the first
questions is 1) How can it be designed a flexible IS?
The second question is related to the context of the
system 2) is it possible to achieve flexibility in
legacy systems?
Additionally, the evolution of a system as a part
of an organization should be defined, because the
reusability, extensibility and interoperability of a
system may help the flexibility for new
functionalities in order to support the organization.
This context illustrate new questions 3) How can it
be identified the interoperability in an information
system? 4) Is it possible to achieve interoperability
in legacy systems just adding new functionalities? 5)
How can it be achieve the reusability? 6) How can it
be achieve the extensibility? 7) Could the
extensibility and reusability improve the adaptability
of an information system? These questions should be
responded before proposing a new approach to
achieve these features.
Therefore, it is significant to define the main
features for an interoperable system, focusing in the
extension and reusability in order to achieve
evolvable characteristics to adapt the current system
to the organization and their future functionalities.
5 STATE OF THE ART
This research has been focused on the flexibility and
interoperability of information systems (IS), because
according with some authors presented in this study,
the agility of enterprises comprises the
interoperability between internal processes and the
environment of the organization. In the following,
overviews of these terms are presented to identify
their main features.
5.1 Flexibility in Information Systems
Flexibility in information system is “the ease with
which a system or component can be modified for
use in applications or environments other than those
for which it was specifically designed.” (Institute of
Electrical and Electronics Engineers, 1990).
Currently, this feature has been pursued for
enterprises, because the capability to change for less
time in a lower cost may bring a competitive
advantage. For instance, some authors emphasise
that IS should have the flexibility to integrate the
external information from stakeholders (suppliers,
co-operators and clients) with the inner processes, in
order to provide a competitive advantage and more
flexibility to the enterprises. (Qi and Luo, 2007;
Steven and Alevifard, 2013). Additionally, the
flexibility of IS can minimize the uncertainty from
the changing customer demand, because the
flexibility of IS could support the core processes of
the business and help to track in real time the variety
of products, warehouse space, transportation and
suppliers (Li and Qi, 2008).
The lack of a standard to identify and evaluate
flexibility of IS may be for its dependency from
external factors such as stakeholders, business
AnApproachtoDevelopFlexibleSystemswithOrganizational-interoperabilityRequirements
37
policies and new technologies. Scherrer-Rathje
(2012) summarizes the common dimensions of
flexibility in IS and proposes taxonomy based on
end-users studies. He defined as key factors the
system connectivity, process integration,
hierarchical integration, user customizability and
consistency. Although, this taxonomy is useful to
understand the several dimensions of flexibility, this
is focused on a theoretical cost and effort to add
more flexibility, but it does not explain how to
achieve these dimensions or calculate the real cost of
flexibility.
On the other hand, flexibility in information
systems can be explained in terms of the ability to
change at a minimum cost, where the cost and time
to provide a new IS functionality to the organization
is named the “penalty of change” (POC). This cost is
inversely proportional to the flexibility of an IS and
can be calculated as the probabilities sum of future
change demands (Furukawa and Minami, 2013).
However, the POC is subjective, because this forgets
other factors such as development and end-user
adaptability. For instance, if the end-user
adaptability is low, it will have a delay to adopt a
new functionality, even if the development team
have the enough flexibility to quickly create a new
functionality. Furukawa (2013) classified the risk to
change in IT adoption, service area, system
structure, fault tolerance and exchangeability,
because he states that planning in a long-term to
reduce the cost to design the system and improve of
skills and experience of the IT department, can
minimize the POC. However, there are not concrete
methods to achieve his strategies.
In the software engineering, the flexibility is
commonly seen as a result of other factors such as
standardization of architecture and software process
(Liu, et al., 2008). Certainly, standards may help the
flexibility, albeit the flexibility should be seen as a
part of the design from the beginning. For instance,
SOA possess standards and composition of services
that can support flexibility (Chen, et al., 2014), but
the lack of consideration of flexibility from the
analysis of requirement may imply a design of a
limited IS (Naab, 2011).
Agile methodologies have been using concepts
from agile manufacturing in the software and
hardware design to customize final products
(Kettunen, 2009). For example, the product-line
architecting can achieve the mass customization of
products with a common platform, which is used
through of development of new products or versions
(Díaz, et al., 2014). Although, agile methodology
pursues the flexibility to change at the minimum
effort possible its software components, it has based
on agile manufacturing of their products, forgetting
the identification of flexibility in the system and the
organization.
Finally, some works have faced flexibility due to
the complexity of the problem and the information
system. The flexibility of user interfaces has been
researched to divide the content between static and
the dynamic in order to change the user's interface,
without an intervention from a programmer
(Bonacin, et al., 2007). An extension of this works is
the management of user interactions as an array of
facts, which makes an action plan to change the
user’s interface after of analysing the norms and the
context identified (Fortuna, et al., 2010). Other
research to face flexibility is the solution proposed
by Li (2010), who analysed the flexibility in the
clinical pathway with a semiotic approach to identify
the context between the agents and their norms of
negotiation. Although, these cases face flexibility
by means of norm analysis, they do not identify
requirements of interoperability and flexibility from
the inception stage.
5.2 Interoperability in Information
Systems
The definition of interoperability and their features
are not clear, because there is confusion between
integration and interoperability. The interoperability
can be define as “the ability of two systems to
understand one another and to use functionalities of
one another”, and the integration as "the interaction
between enterprise entities necessary to achieve
domain objectives", then the components cannot be
separated (Chen, et al., 2008). In this context,
interoperability can be seen as self-independent
systems or components, which is integrated among
them. However, enterprise integration may be
interoperable, but it is not mandatory.
Currently, several frameworks have been
proposed for integration and interoperability of
information systems' architectures. However the
majority of works have been on business processes
or technical issues, failing to consider the
organizational dimension. For instance, the
framework for Level of Information System
Interoperability (LISI) proposed by the Department
of Defence of the United States (Architectures
Working Group, 1998) defines five levels of
interoperability, but its list of attributes to identify
each level covers just standards and procedures.
Other example is the ATHENA interoperability
framework (AIF), which considers three
IC3K2014-DoctoralConsortium
38
components: conceptual integration, application
integration and technical integration (Vernadat,
2010). Although, these components include
guidelines for interoperability issues, they partially
cover the organizational point of view.
On the other hand, some approaches have made
with organizational considerations. The European
Interoperability Framework (EIF) proposed 4 levels
of interoperability: technical, semantic,
organizational and legal. Such as the previous
framework, the first two levels are focused on the
problems to interchange information among systems
and how that this can be interpreted. Its top levels
propose the coordination among inter-organizations,
considering legal aspects to data exchange in the
definition of processes, synchronizations steps and
messages. Additionally, the European Commission
suggests the service orientations to design and
develop systems, due to their components are
modular and loosely coupled (European
Commission, 2010). However, the organizational
aspects of the EIF has been limited to formal
relationships among organizations and users,
neglected the informal aspects. This lack is seen in
the work of Allen (2013), who described the
informational problem in the emergency service
using activity theory. He concluded that the
interoperability problem is the analysis focused on
technological solutions, when the real problem is the
organizational constrain in the interchange of
information. For instance, in an emergency situation,
every organization should access the police
information in order to know if the emergency is in a
risk area.
New approaches have proposed the
interoperability from the organizational semiotic,
where the pragmatic level (associated with
intentions) should be identified, because this allows
the coordination of work across different people.
These interoperability requirements should be
articulated with their context such as stakeholder,
location, constraints and motivations (Liu, et al.,
2014). This work proposes two dimensions to
evaluate the interoperability in an organization by
means the observation of abstract processes, which
include 2 dimensions. The former dimension is
referring to the organizational onion (technical,
formal and informal) and the latter to the taxonomy
of behavioural norms (substantive, communication
and control).
6 METHODOLOGY
Currently, the research of software engineering has
focused in the creation of new methods or objects,
paying attention in artificial aspects instead of
natural aspects. Then the research philosophy should
consider an integrated perspective with the capacity
to understand the organization aspect.
Constructivism philosophy is useful to understand
the subjectivism of organization without define a
rigid structure of methods to research it (Lazaro and
Marcos, 2005).
In order to define the flexibility, it is needed a
theoretical understanding to identify their main
characteristics and predict some particular cases
(Hevner, et al., 2004). The next step is the
identification of requirements, where the flexibility
and interoperability are part of the requirement
analysis. Consequently, it will propose an approach
to analyse and design the requirements with software
development methodologies. Finally, the results will
be evaluated with a case study.
6.1 Organizational Semiotic
In spite of exists several definitions about flexibility,
their meaning is related to the agility of processes in
the enterprise, forgetting to analyse the signs of
flexibility in the organization in order to understand
the current functionality and its potential extensions.
Semiotic can provide the theoretical foundation to
examine the nature and properties of all kinds of
signs and how they are part of the social life (Morris,
1946).
Organizational semiotic is one branch of
semiotic, which observes how the organizational
behaviour can be affected by the communication of
signs and their interpretation. Stamper (1973)
proposes a semiotic framework to study
organizations, which deal with the structures,
meanings and usage of signs. The levels of the
semiotic framework from the lower to the upper
level are: physical world, empirics, syntactics,
semantics, pragmatics and social world. This
framework is useful to understand the differences of
the social consequences of signs, their structure and
how they are transmitted. In the analysis of
flexibility is significant to realize the level of
flexibility in an Information System, because the
formal requirement of an organization may be
different of the real flexibility. For instance, it is
important the understanding of the level of
flexibility of an organization before proposing a
design of a system, because some rigid organizations
AnApproachtoDevelopFlexibleSystemswithOrganizational-interoperabilityRequirements
39
such as government organizations has policies that
can affect the flexibility of their process and the IS.
The concretes applications of this organizational
semiotic to the Information Field can be seen in the
Methods for Eliciting, Analysing and Specifying
Users’ Requirement (MEASURE) (Liu, 2000), and
the Analysing and Modelling Behaviour of Legacy
System (AMBOLS) for requirement recovery (Liu,
2005), which propose methods such as the Semantic
Analysis Method (SEM) and Norm Analysis Method
(NAM) to develop information systems. These
methods are significant to analyse and design
information system in the requirement stage,
because they can address the identification of
organizational aspects. For instance, SEM is useful
to analyse the agents of the organization and their
possibilities of interaction with the environment and
the system. The figure 1 illustrates an overview of
these methods (left) in each stag (right) of this
research
Figure 1: Methods (left) and stages (right) of this research.
6.2 Assessment Model for Flexible
Systems
Flexibility for information system is a characteristic,
which can be seen from different point of view. For
instance, from a technical perspective, there are
several patterns such as singleton or factory, to
design information system with an extensible and
flexibility features. For that reason, the flexibility
should be defined in different levels to identify the
level of flexibility needed. The semiotic framework
is useful to analyse and describe every definition of
flexibility.
This stage is a descriptive study based on
literature review, considering the interpretation of
flexibility in each part of the framework, in order to
define a guideline to identify flexibility in
organizations and information systems.
6.3 Requirement Analysis for
Flexibility and Interoperability
The second stage is based on AMBOLS (Liu, 2005),
because its three stages (Behaviour Capture,
Dynamic Behaviour Modelling and Requirements
Derivation) are useful to understand the pattern
behaviour of organization and their dynamic
conditions. However, this technique is focused on
legacy systems and their impact in new
functionalities, forgetting the formal analysis of
flexibility, new systems and new technologies. On
the other hand, although AMBOLS consider the
study of IT environment and the interaction between
human and machine, this does not describe the
interoperability of the organizations and their
possible expansions. For that reason, the semiotic
framework of interoperability may help to analyse
this kinds of requirements (Li, et al., 2013), because
this holistic point of view considers the
interoperability in each level of the semiotic
framework. For instance, According to Li (op. cit.),
the analysis of the interoperability from the syntactic
level can identify the non-functional requirement to
propose standard data to interchange the information
in different platforms such as JAVA and .NET.
6.4 Approach to Analyse and Design
Systems with Flexibility
This research considers techniques to analyse and
design system, including flexibility to modify the
business for future changes and new functionalities.
One example is the capability of the Service
Oriented Architecture (SOA) to support the
flexibility and interoperable requirements, because
its main features are (Hirschheim, et al., 2010):
The functionality exposed (services) is fully
encapsulated, with well-defined rules.
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Each service is adhered to a set of standards to
allow interoperability.
This architecture considers a service registry
with definitions and connection points, in order
to improve a transparent discovery of service
and re-direction.
The specification and invocations of services
are expressed with a protocol based on XML.
The encapsulation of functionality of each
service may help the flexibility of the system,
because it is possible an orchestration or
composition of service, in order to change or reuse
the functionality of the system. Additionally, the
standards may help to achieve the interoperability of
the current system or legacy systems by means of
their encapsulation of service.
New steps of process to achieve the flexibility of
systems from the analysis and designed should be
proposed in order to achieve it, where the semantic
and norm analysis worked in the previous stage is
crucial. The semantic analysis is useful to analyse
and design the static view of the system and the
norms for the dynamic part. An example of this can
be seen in the research of Bonacin (2004), where he
proposed a heuristic approach to translate an
ontology chart (part of the semantic analysis) into a
class diagram. On the other hand, steps to analysed
and design services such as the proposed by Erl are
considered to compose service in different layers
(Erl, 2005).
6.5 Validation
The result of this research can be evaluated by
means of qualitative information using a case study,
identifying the requirement for legacy or new
systems. Although, an enterprise with agile business
is desirable, it is not mandatory to work with this
methodology to identify requirements.
7 EXPECTED OUTCOMES
The expected outcome of this research is to provide
an approach to design information systems with
features of flexibility and interoperability in order to
support the business agility, decreasing the time and
cost for future developments or maintenance of their
components. The expected partial outcomes are the
following:
Assessment model of flexibility: Theoretical
model to identify kinds of flexibility in an
information system.
An approach to analyse and model business
requirement: structured method to identify
requirements, considering the organizational
interoperability and flexibility.
An approach to analyse and model information
system: Steps and models to design
information systems with features of flexibility
and interoperability.
ACKNOWLEDGEMENT
D. F. acknowledges partial support from CONICYT
(BCH72130542/2012) in this work.
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