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  1. a collection of people who interact with each other, are aware of each other and see themselves as a group. Very small groups, where each member knows the others well and can interact in a face-to-face manner, are often termed primary groups. Those with a larger membership where individuals are unable to interact directly with all the members are called secondary groups. Much of the work conducted in ORGANIZATIONS is done by groups. Work groups may take the form of either a number of people undertaking a particular task, directed by a manager (see MANAGEMENT) or SUPERVISOR, or a team in which coordination of a range of activities takes place and where status is more equal. The distinction is not a hard and fast one, but groups of production workers are generally referred to as ‘work groups’ whilst groups of managers tend to be referred to as teams. Both are formal groups in that they are consciously established to chieve certain work goals. By contrast, informal groups are those which emerge naturally, are based primarily on friendship, shared attributes or status, and whose membership does not necessarily coincide with that of formal groups. An early indication of the importance of social groups in organizations was provided by the HAWTHORNE STUDIES and exemplified in HUMAN RELATIONS philosophy The Hawthorne researchers found that informal groups could emerge alongside formal groups, with work norms which contradicted those of management. An earlier investigation in the research programme, however, seemed to find that a style of management (see MANAGEMENT STYLE, LEADERSHIP) which displayed an interest in workers could help collections of workers to cohere into effective groups, committed to managerial goals.

    Subsequently managers have adopted a variety of means to influence the activities of groups so as to harness them in support of managerial goals. One such measure is basing pay or bonuses on group output, so as to provide a stimulus to group members to work effectively together and to pressurize recalcitrant members into following group policy. Similarly, the creation of ‘semiautonomous work groups’ (see JOB DESIGN AND REDESIGN) with the power to allocate group members' tasks is designed to heighten both group cohesion and commitment to effective task performance. However, a question that still nevertheless vexes managers is why some groups are effective whilst others are not. For this reason substantial research has been conducted into group development and dynamics (i.e. the stages of growth that they go through and the patterns of interaction within them). One approach has suggested that groups go through four stages of development:

    1. forming (i.e. getting to know each other);
    2. storming (initial conflict as individuals compete for leadership positions and to influence the direction taken by the group);
    3. norming (the establishment of shared values);
    4. performing (where the group utilizes its strengths to perform desired activities). Many groups find difficulty in moving beyond the second and third stages. Team-building exercises, to encourage group cohesion, are an attempt to solve such problems. Research has shown that individual contributions to groups differ, and that in some cases they are effective whilst in others they are not. Management writer Meredith Belbin (1926-) has argued that each individual has a preferred team role and a secondary role which he or she adopts if unable to occupy his or her preferred role. These roles are chairman (setting the agenda), shaper (defining the task), plant (generating ideas), monitor/evaluator (evaluating ideas), company worker (organizing the group), resource investigator (seeking out resources), team worker (maintaining group cohesion) and finisher (ensuring deadlines are kept). On the basis of research of this type managers have attempted to influence group performance by selecting appropriate team members.

    Whilst team working is generally thought to be a useful approach to achieving organizational goals, it can have negative effects. The most damaging of these is groupthink, where pressures towards group conformity stifle creativity. See TEAM BREIFING.

  2. a collection of interrelated JOINT-STOCK COMPANIES which usually consists of a HOLDING COMPANY and a number of SUBSIDIARY COMPANIES and ASSOCIATED COMPANIES which tends to operate as a single business unit.
Collins Dictionary of Business, 3rd ed. © 2002, 2005 C Pass, B Lowes, A Pendleton, L Chadwick, D O’Reilly and M Afferson
References in periodicals archive ?
These dyes 3(a-f) are showed 1517-1535 [cm.sup.-1] for (N=N) azo group. The [v.sub.max] values at 3085-3005 [cm.sup.-1] (aromatic C-H) and at 2986-2851 [cm.sup.-1] (aliphatic C-H) were also observed.
As it can be seen in Figures 2 and 3, the azo group plays an important role in the molecule as the nature of the bonding between the two nitrogen atoms correlates well with the character of the entire molecular orbital.
Due to nitrogen, oxygen, two phenyl rings rich in [pi] electrons and azo group (-N=N-), the AYGG molecule can be adsorbed through the interaction between the lone pair of electrons of the oxygen and nitrogen atoms or the electron-rich [pi] systems of the aromatic rings and the azo group [26] and an adsorbent.
With increasing the absorbed dose, the number of free radicals increases, as a result, breaks down of the azo group takes place and the chromophores disappear which leading to color bleaching.
Catalytic Effect of Azo Group on the Curing Kinetics of Epoxy/Anhydride System
Azo dyes are characterized by the presence of one or more azo group. Because azo dyes have chemical stability, they are resistant to biological and chemical dewatering processes and therefore cause disposal problems in dye industries [3].
Polymer materials are changed color, because it electrons of unsaturated bond or group, such as carbonyl, ethylene, and azo group, absorb visible light.
A huge number of fabric pollutants in the group of azo dyes are categorized by an azo group containing two nitrogen atoms.
It means that interaction of radiation lead to breakdown of colouring chromophoric azo group and new products were formed via degradation.
The photoinduced properties are strongly associated, on the one hand, with the polymer matrix properties such as the glass transition temperature, molecular weight, position of the azo group (i.e., in the main or side chain), and on the other hand, with the chromophore structure, its content, and type of binding to the polymer mainchain (3), (13), (14).