Teamwork is "work done by several associates with each doing a part but all subordinating personal prominence to the efficiency of the whole" .
In a business setting accounting techniques may be used to provide financial measures of the benefits of teamwork which are useful for justifying the concept. Teamwork is increasingly advocated by health care policy makers as a means of assuring quality and safety in the delivery of services; a committee of the Institute of Medicine recommended in 2000 that patient safety programs "establish interdisciplinary team training programs for providers that incorporate proven methods of team training, such as simulation."
In health care, a systematic concept analysis in 2008 concluded teamwork to be "a dynamic process involving two or more healthcare professionals with complementary backgrounds and skills, sharing common health goals and exercising concerted physical and mental effort in assessing, planning, or evaluating patient care." Elsewhere teamwork is defined as "those behaviours that facilitate effective team member interaction," with "team" defined as "a group of two or more individuals who perform some work related task, interact with one another dynamically, have a shared past, have a foreseeable shared future, and share a common fate." Another definition for teamwork proposed in 2008 is "the interdependent components of performance required to effectively coordinate the performance of multiple individuals"; as such, teamwork is "nested within" the broader concept of team performance which also includes individual-level taskwork. A 2012 review of the academic literature found that the word "teamwork" has been used "as a catchall to refer to a number of behavioral processes and emergent states."
Teamwork processes 
- Transition processes (between periods of action)
- Mission analysis
- Goal specification
- Strategy formulation
- Action processes (when the team attempts to accomplish its goals and objectives)
- Monitoring progress toward goals
- Systems monitoring
- Team monitoring and backup behavior
- Interpersonal processes (present in both action periods and transition periods)
- Conflict management
- Motivation and confidence building
- Affect management
Researchers have confirmed that performing teamwork works better when you are with a close person. This is due to a chemical called serotonin( 5-Hydroxytryptamine (5-HT) which helps an individual to communicate better and think more positively which. Serotonin is produced when an individual is in a situation where he/she is in comfortable environment. Sometime it just doesn't workWhat does this mean?
Training to improve teamwork 
As summarized in a 2008 review, "team training promotes teamwork and enhances team performance." In specific, a 2008 meta-analysis of 45 published and unpublished studies concluded that team training is "useful for improving cognitive outcomes, affective outcomes, teamwork processes, and performance outcomes."
Benefits of Teamwork 
- Problems solving: A single brain can’t bounce different ideas off of each other. Each team member has a responsibility to contribute equally and offer their unique perspective on a problem to arrive at the best possible solution. Teamwork can lead to better decisions, products, or services. The quality of teamwork may be measured by analyzing the following six components of collaboration among team members: communication, coordination, balance of member contributions, mutual support, effort, and cohesion. In one study, teamwork quality as measured in this manner correlated with team performance in the areas of effectiveness (i.e., producing high quality work) and efficiency (i.e., meeting schedules and budgets). A 2008 meta-analysis also found a relationship between teamwork and team effectiveness.
- Accomplish tasks faster: A single person taking on multiple tasks will not be able to perform at a same pace as a team can. When people work together they can complete tasks faster by dividing the work to people of different abilities and knowledge.
- Healthy competition: A healthy competition in groups can be used to motivate individuals and help the team excel.
- Developing Relationships: A team that continues to work together will eventually develop an increased level of bonding. This can help people avoid unnecessary conflicts since they have become well acquainted with each other through team work. Team members’ ratings of their satisfaction with a team is correlated with the level of teamwork processes present.
- Everyone has unique qualities: Every team member can offer their unique knowledge and ability to help improve other team members. Through teamwork the sharing of these qualities will allow team members to be more productive in the future.
Things to Avoid 
- Teamwork may have an "unintended effect of fermenting hostility toward the managerial goal of making the teams fully self-managing." In one case study of a clothing manufacturer, a switch from production line work (with bonuses given for individual performance) to teamwork (in which an individual's earnings depended on team performance) caused workers to resent having to monitor each other.
- There is a potential of "social loafing" (i.e., an individual's doing less work in a team than what he/she would normally do working individually). In order to minimize social loafing, management can make individual performance more visible while in a team setting. This can be done by forming smaller teams, specializing specific tasks to certain individuals, and measuring individual performance. Social loafing can also be reduced by increasing employee motivation, by selecting employees who have previously shown themselves to be motivated, and increasing job enrichment. In experiments conducted in the 1990s, an increase in group cohesiveness appeared to decrease social loafing.
- "Teamwork". Merriam-Webster Dictionary online. Retrieved April 26, 2012.
- Ezzamel, Mahmoud, and Hugh Willmott (1998). "Accounting for Teamwork: a Critical Study of Group-Based Systems of Organizational Control". Administrative Science Quarterly 43 (2): 358–396. doi:10.2307/2393856.
- Kohn, Linda T., Janet M. Corrigan, and Molla S. Donaldson, ed. (2000). To Err Is Human: Building a Safer Health System. Washington, DC: National Academy Press. p. 14. ISBN 0309068371.
- Xyrichis, Andreas, and Emma Ream (2008). "Teamwork: a Concept Analysis". Journal of Advanced Nursing 61 (2): 232–241. doi:10.1111/j.1365-2648.2007.04496.x. PMID 18186914.
- Beaubien, J. M., and D. P. Baker (2004). "The Use of Simulation for Training Teamwork Skills in Health Care: How Low Can You Go?". Quality & Safety in Health Care 13 (Supplement 1): i51–i56. doi:10.1136/qshc.2004.009845. PMC 1765794. PMID 15465956.
- Salas, Eduardo, Nancy J. Cooke, and Michael A. Rosen (2008). "On Teams, Teamwork, as well as Team Performance: Discoveries and Developments". Human Factors: The Journal of the Human Factors and Ergonomics Society 50 (3): 540–547. doi:10.1518/001872008X288457.
- Valentine, Melissa A., Ingrid M. Nembhard, and Amy C. Edmondson (April 12, 2012). "Measuring Teamwork in Health Care Settings: A Review of Survey Instruments". Working Paper 11-116. Harvard Business School. Retrieved April 26, 2012.
- Marks, Michelle A., John E. Mathieu, and Stephen J. Zaccaro (2001). "A Temporally Based Framework and Taxonomy of Team Processes". Academy of Management Review 26 (3): 356–376. doi:10.2307/259182.
- LePine, Jeffery A., Ronald F. Piccolo, Christine L. Jackson, John E. Mathieu, and Jessica R. Saul (2008). "A Meta-Analysis of Teamwork Processes: Tests of a Multidimensional Model and Relationships with Team Effectiveness Criteria". Personnel Psychology 61 (2): 273–307. doi:10.1111/j.1744-6570.2008.00114.x. ISSN 0031-5826.
- Salas, Eduardo, Deborah DiazGranados, Cameron Klein, C. Shawn Burke, Kevin C. Stagl, Gerald F. Goodwin, and Stanley M. Halpin (2008). "Does Team Training Improve Team Performance? A Meta-Analysis". Human Factors: The Journal of the Human Factors and Ergonomics Society 50 (6): 903–933. doi:10.1518/001872008X375009.
- Hoegl, Martin, and Hans Georg Gemuenden (2001). "Teamwork Quality and the Success of Innovative Projects: a Theoretical Concept and Empirical Evidence". Organization Science 12 (4): 435–449. JSTOR 3085981.
- Manser, T. (2009). "Teamwork and Patient Safety in Dynamic Domains of Healthcare: a Review of the Literature". Acta Anaesthesiologica Scandinavica 53 (2): 143–151. doi:10.1111/j.1399-6576.2008.01717.x.
- McShane, Steven Lattimore, and Mary Ann Young Von Glinow (2010). Organizational Behavior: Emerging Knowledge and Practice for the Real World (5th ed.). Boston: McGraw-Hill Irwin. ISBN 9780073381237.
- Karau, Steven J., and Kipling D. Williams (1997). "The Effects of Group Cohesiveness on Social Loafing and Social Compensation". Group Dynamics: Theory, Research, and Practice 1 (2): 156–168. doi:10.1037/1089-2622.214.171.124.
- Karau, Steven J., and Jason W. Hart (1998). "Group Cohesiveness and Social Loafing: Effects of a Social Interaction Manipulation on Individual Motivation within Groups". Group Dynamics: Theory, Research, and Practice 2 (3): 185–191. doi:10.1037/1089-26126.96.36.199.
Further reading 
- Larson, Carl E., and Frank M. LaFasto (1989). Teamwork: What Must Go Right, What Can Go Wrong. Newbury Park, CA: SAGE. ISBN 0803932898.
- Hackman, J. Richard, ed. (1990). Groups That Work (and Those That Don't): Creating Conditions for Effective Teamwork. San Francisco: Jossey-Bass. ISBN 1555421873.
- Stevens, Michael J.; Campion, Michael A. (1994). "The Knowledge, Skill, and Ability Requirements for Teamwork: Implications for Human Resource Management". Journal of Management 20 (2): 503–530. doi:10.1177/014920639402000210.
- Jones, Gareth R.; George, Jennifer M. (1998). "The Experience and Evolution of Trust: Implications for Cooperation and Teamwork". The Academy of Management Review 23 (3): 531–546. doi:10.2307/259293.
- Sexton, J. Bryan, Eric J. Thomas, and Robert L. Helmreich (2000). "Error, Stress, and Teamwork in Medicine and Aviation: Cross Sectional Surveys". BMJ 320: 745–749. doi:10.1136/bmj.320.7237.745. PMC 27316. PMID 10720356.
- Hall, P.; Weaver, L. (2001). "Interdisciplinary Education and Teamwork: a Long and Winding Road". Medical Education 35 (9): 867–875. doi:10.1046/j.1365-2923.2001.00919.x.
- Morey, John C.; Simon, Robert; Jay, Gregory D.; Wears, Robert L.; Salisbury, Mary; Dukes, Kimberly A.; Berns, Scott D. (2002). "Error Reduction and Performance Improvement in the Emergency Department through Formal Teamwork Training: Evaluation Results of the MedTeams Project". Health Services Research 37 (6): 1553–1581. doi:10.1111/1475-6773.01104.
- Thomas, Eric J.; Sexton, J. Bryan; Helmreich, Robert L. (2003). "Discrepant Attitudes about Teamwork Among Critical Care Nurses and Physicians". Critical Care Medicine 31 (3): 956–959. doi:10.1097/01.CCM.0000056183.89175.76.
- Sheard, A. G., and A. P. Kakabadse (2004). "A Process Perspective on Leadership and Team Development". The Journal of Management Development 23 (1): 7–11,13–41,43–79,81–106. doi:10.1108/02621710410511027.
- Leonard, M.; Graham, S.; Bonacum, D. (2004). "The Human Factor: the Critical Importance of Effective Teamwork and Communication in Providing Safe Care". Quality and Safety in Health Care 13 (Supplement 1): i85–i90. doi:10.1136/qshc.2004.010033.
- Salas, Eduardo; Sims, Dana E.; Burke, C. Shawn (2005). "Is there a 'Big Five' in Teamwork?". Small Group Research 36 (5): 555–599. doi:10.1177/1046496405277134.
- Baker, David P.; Day, Rachel; Salas, Eduardo (2006). "Teamwork as an Essential Component of High-Reliability Organizations". Health Services Research 41 (4p2): 1576–1598. doi:10.1111/j.1475-6773.2006.00566.x. PMC 1955345. PMID 16898980.
- DeChurch, Leslie A.; Mesmer-Magnus, Jessica R. (2010). "The Cognitive Underpinnings of Effective Teamwork: a Meta-Analysis". Journal of Applied Psychology 95 (1): 32–53. doi:10.1037/a0017328.
- West, Michael (2012). Effective Teamwork: Practical Lessons from Organizational Research. Chichester, West Sussex, UK: BPS Blackwell. ISBN 9780470974988.