Properties of Services

A service is realized by the Service System through the relationships of Service System Entities that interact (or relate) in a particular way to deliver the specific service via a Service Level Agreement (SLA). Current management frameworks typically, only focus on the interfaces of a single Service System entity. While SLAs are mapped to the respective customer requirements, policies are provider-specific means to express constraints and rules for their internal operations. These rules may be independent of any particular customer (Theilmann 2009).

Services not only involve the interaction between the service provider and the consumer to produce value but have other attributes like intangible quality of service, e.g., ambulance service availability and response time to an emergency request. The demand for service may have loads dependent on time of day, day of week, season or unexpected needs (e.g., natural disasters, product promotion campaigns, etc.). For instance travel services have peak demands during Christmas, Thanksgiving weekend, Mother’s day is usually the highest volume handling day for a telecommunications provider, tax services peak during extended periods (January through mid-April), and so on. Services cannot be inventoried; they are rendered at the time they are requested.

Additionally, for a business enterprise delivering the service at the minimum cost while maximizing its profits may be the service objective; while for a non-profit organization the objective may be to maximize customer satisfaction while optimizing the resources required to render the service; e.g., during a natural disaster. Thus, the design and operations of service systems “is all about finding the appropriate balance between the resources devoted to the systems and the demands placed on the system so that the quality of service to the customer is as good as possible” (Daskin 2010).

Service Level Agreement (SLA)

A Service Level Agreement (SLA) is a set of technical (functional) and non-technical (non-functional) parameters agreed between customers and service providers. SLA’s can and do contain administrative level (non-functional)business related parameters such as SLA duration, service availability for the SLA duration, consequences for variations, failure reporting, priorities, and provisions for modifications to the SLA. However, for service level management the service level (technical) parameters need to be defined, monitored and assessed; these parameters may include such things as throughput, quality, availability, security, performance, reliability (Mean Time between Failure (MTBF), maximum downtime, time-to-repair), and resource allocation.

A SLA represents the negotiated service level requirements (SLR) of the customer and should establish valid and reliable service performance measures since it is usually the basis for effective service level management (SLM). The goal of SLM is to ensure that service providers meet and maintain the prescribed quality of service (QoS). However, care should be taken since in some domains, the term QoS refers only to resource reservation control mechanisms rather than the achieved service quality, e.g., Internet Protocol (IP) networks. Some terms used to mean the “achieved service quality”, include quality of experience (QoE), user-perceived performance and degree of satisfaction of the user, and these other terms are more generally used across service domains.

Non-functional properties fall into two basic categories: Business properties such as cost and method of payment and Environmental properties such as time and location. Business and Environmental properties are classified as “context properties” by Youakim Badr (Badr et al. 2008). QoS properties are things like availability , resilience , security , reliability , scalability , agreement duration, response times, repair times, usability, etc. A variety of service evaluation measures are shown in the table below.

Table 1. Service Systems Engineering: Service Evaluation Measures

Adapted from Tien and Berg (2003) pending authorization.

Service Key Performance Indicators (KPI)

Service Key Performance Indicators (KPI) are defined and agreed to in the SLA; the service KPIs are decomposed into Service Process Measures (SPM) and Technical Performance Measures (TPM) during the analysis stage of the SSE process. In the design process the KPIs and TPM are allocated to Service System entities and their components, the business processes and their components so as to ensure compliance with SLAs. The allocated measures generate "derived requirements" (Service Level Requirements (SLR)) for the system entities and their relationships, the service entities components and the data and information flows required in the Service Systems to monitor, measure, and assess end-to-end SLA. These allocations ensure that the appropriate performance indicators apply to each of the links in the service value chain.

TPM’s are typically categorized as number of defective parts in a manufacturing service, data transmission latency and data throughput in an end-to-end application service, IP QoS expressed by latency, jitter delay, and throughput; and SPM are typically categorized by service provisioning time, end-to-end Response Times to a service request (a combination of data and objective feedback), and Quality of Experience (QoE verified by objective feedback). Together, the KPI (TPM+SPM) and perception measures make up the service level management function. A Quality Assurance Systems (QAS), Continuous Service Improvement (CSI) processes and Process Quality Management and Improvement (PQMI) should be planned, designed, deployed and managed for the capability to continuously improve the Service System and to monitor compliance with SLAs (PQMI, Capability Maturity Model Integration (CMMI), International Organization for Standardization (ISO) Standards 9001, TL 9000, ITIL V3, etc.).

As discussed earlier QoS needs to correlate customer perceived quality (subjective measures) with objective SPM & TPM measures. There are several techniques available to help monitor, measure, and assess TPM’s, but most are a variation on the theme of culling information from TPM’s using for example, Perceptual Speech Quality Measure (PSQM) and Perceptual Evaluation of Video Quality (PEVQ) and enhancing or verifying this information with customer or end-user perception of service by extending Mean Opinion Score (MOS) techniques/Customer Opinion Models (Bell System 1984). TSE played an important role in finding methodologies for correlation between perception and objective measures for the services of the 20th Century; SSE should continue to encourage multidisciplinary participation to equally find methodologies, processes and tools to correlate perceived service quality with TPM and with SPM for the services of the 21st Century. (Freeman 2004)

Subjective (qualitative) service quality is the customer’s perceived conformity of the service with the expected objective. Word-of-mouth, personal needs and past experiences create an expected service. This perception must be captured via surveys and interviews. The perceived service is then compared with the expected service by the customers, which leads to the perceived service quality as a result. Care should be taken to understand that subjective measures appear to measure customer attitudes, and attitudes may be the result of several encounters with the service as well as numerous encounters with other similar services.

In summary, the SLA documents Service Level Requirements (SLR) and establishes reliable and valid service performance measures (technical parameters) and levels agreed to. These technical parameters and their objectives are then monitored and continuously compared against both objective and subjective data culled from multiple internal and external sources (Service Level Management). The goal is not to report the level of service in a given period, but to develop and implement a dynamic system capable of predicting and driving service level improvement over time (i.e., Continual Service Improvement- CSI).

Evolution of Services

The second, third, and fourth decades of the 21st century will almost certainly see similar and probably accelerated technology development as seen in the prior three decades. We will also see mass collaboration become an established mode of operation. We are already seeing the beginnings of mass collaboration in developments like value co-creation where loosely entangled actors or entities come together to create value in unprecedented ways but which meet mutual and broader market requirements. Further developments in the technology, use, and acceptance of Social Media will continue to fuel the acceleration of these developments.

The next decades will see the grounding of concepts such as crowdsourcing, coined by Jeff Howe in a June 2006 Wired magazine article, open innovation, promoted by Henry Chesbrough, a professor and executive director at the Center for Open Innovation at Berkeley, and Wikinomics, consultant Don Tapscott’s concept of corporations using mass collaboration and open source innovation supported by Enterprise 2.0 tools.

Roberto Saracco, a telecommunications expert specializing in analyzing economical impacts of technology evolution, argues that “Communications will be the invisible fabric connecting us and the world whenever and wherever we happen to be in a completely seamless way, connecting us so transparently, cheaply, and effortlessly that very seldom will we think about it.” The ubiquity and invisibility of these communications will greatly facilitate the creation and destruction of ad hoc collectives, i.e. groups of entities that share or are motivated by at least one common issue or interest, or work together on a specific project(s) to achieve a common objective. This enterprise may engender the concept of the hive mind (the collective intelligence of many), which will be an intelligent version of real-life super organisms such as ant or bee nests. (Hölldobler and Wilson 2009)

These models will most certainly give rise to issues of property rights and liabilities; access rights for both the provider and the customer can be owned outright, contracted/leased, shared or privileged access (Spohrer 2011). For now, we are on the cusp of a management revolution that is likely to be as profound and unsettling as the one that gave birth to the modern industrial age. Driven by the emergence of powerful new collaborative technologies, this transformation will radically reshape the nature of work, the boundaries of the enterprise, and the responsibilities of business leaders. (McAfee 2009)

The service-providing industry in the US is divided into thirteen sectors (Chang 2010):

1. Professional and Business services
2. Healthcare and Social Assistance
3. State and Local Government
4. Leisure and Hospitality
5. Other Services
6. Educational Services
7. Retail Trade
8. Financial activities
9. Transportation and warehousing
10. Wholesale trade
11. Information
12. Federal government
13. Utilities

Spohrer (2011) goes beyond the service sectors to propose three types of Service Systems:

1. Systems that focus on flow of things: Transportation and Supply chain, Water and waste recycling, Food and Products, Energy and Electric Grid, Information/ICT & Cloud
2. Systems that focus in Human Activities and Development: Buildings and Construction, Retail and Hospitality/ Media and Entertainment, Banking & Finance/ Business Consulting, Healthcare & Family Life, Education & Work Life/Jobs and Entrepreneurship
3. Systems that focus on Governing: City, State, Nation

Categorizing types and sectors of services is an important beginning because it can lead to a better understanding of the emerging rules and relationships in service value chains. This approach can further enhance the value co-creation capabilities of innovative service concepts to contribute to our quality of life. The classification also helps in identifying different objectives and constraints for the design and operations of the Service System (strategic policies under limited budget: education; strategic with readiness for quick response: national defense; business enterprise: maximizing profit while minimizing cost), etc.

In addition, this classification is being used to determine the overlap and synergies required among different science disciplines to enable trans-disciplinary collaboration and educational programs.

References

Citations

Badr, Y., Abraham, A., Biennier, F., and Grosan, C. 2008. Enhancing Web Service Selection by User Preferences of Non-Functional Features. 4th International Conference on Next Generation Web Services Practices. ISBN: 978-0-7695-3455-8.

Chang 2010. Service Systems Management and Engineering, Creating Strategic Differentiation and Operational Excellence, Chang C.M., John Wiley & Sons, Inc., 2010, ISBN 978-0-470-42332-5.

Daskin, M.S. 2010. Service Science. John Wiley & Sons. ISBN: 978-0-470-52588-3.

Hölldobler, B. and Wilson, E.O. 2009. The Super-organism: The Beauty, Elegance, and Strangeness of Insect Societies. W. W. Norton & Company. ISBN: 9780393067040.

ITIL V3. 2007. ITIL Lifecycle Publication Suite Books. The Stationery Office. ISBN: 978-0113310500.

McAfee, A. 2009. Enterprise 2.0: New Collaborative Tools for Your Organization's Toughest Challenges. Harvard Business School Press, ISBN-10: 1422125874; ISBN-13: 978-1422125878.

Spohrer, J.C. 2011. Service Science: Progress & Directions. International Joint Conference on Service Science. Taipei, Taiwan.

Tien, J,M. and Berg, D. 2003. A Case for Service Systems Engineering. Journal of Systems Science and Systems Engineering 12 (1): 13-38.

Theilmann, W. and Baresi, L. 2009, Multi-level SLAs for Harmonized Management in the Future Internet. Towards the Future Internet - A European Research Perspective. Tselentis et al. (Eds.). IOS Press. Doi:10.3233/978-1-60750-007-0-183.

Primary References

Bell System. 1984. AT&T Bell Labs. Engineering and Operations in Bell System. ISBN: 0-932764-04-5.

Freeman, R.L. 2004. Telecommunication Systems Engineering. Wiley-Interscience. 4 edition. ISBN-10: 0471451339; ISBN-13: 978-0471451334.

ITIL V3. 2007. ITIL Lifecycle Publication Suite Books. The Stationery Office. ISBN: 978-0113310500.

Tien, J,M. and Berg, D. 2003. A Case for Service Systems Engineering. Journal of Systems Science and Systems Engineering 12 (1): 13-38.

Theilmann, W. and Baresi, L. 2009. Multi-level SLAs for Harmonized Management in the Future Internet. Towards the Future Internet - A European Research Perspective. Tselentis et al. (Eds.). IOS Press. Doi:10.3233/978-1-60750-007-0-183.

Additional References

All additional references should be listed in alphabetical order.

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Article Discussion

Brian Wells Comments: Article is mature, interesting and provides good materials and references.

It might be improved by a good summary (Table for example) that provides the properties discussed one by one in the text. If there is a single good reference that discusses or lists properties the reader could be guided to that resource.

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