following is not a contingency factor in control:

Organisation growth

Organisation culture

Decentralised organisation

Organisation structure

Organisation growth

Decentralised organisation is not a contingency factor in control.

Contingency factors are external factors that influence the design and effectiveness of control systems within an organization. They are usually specific to the organization and its environment.

Organisation growth, organisation culture, and organisation structure are examples of contingency factors in control. These factors can influence the level of control needed, the type of control systems used, and the effectiveness of control within the organization.

To determine which of the following is not a contingency factor in control, we need to understand what contingency factors are in the context of control.

Contingency factors are variables that influence the design and implementation of control systems within an organization. These factors can vary from one organization to another, and they can significantly impact how control is established and maintained.

Now, let's analyze each option:

1. Organization growth: This is a contingency factor in control. As an organization grows, its control needs may change. The control systems that work effectively for a small organization may not be suitable for a larger one. Therefore, organization growth is a contingency factor in control.

2. Organization culture: Organization culture is also a contingency factor in control. The control systems within an organization should align with its culture to ensure effectiveness. For example, in a company that values creativity and innovation, control systems may be less rigid to foster experimentation. Hence, organization culture is a contingency factor.

3. Decentralized organization: Decentralization refers to the delegation of decision-making authority across various levels of an organization. It affects how control systems are established. If an organization follows a decentralized structure, control systems need to be flexible and allow autonomy at lower levels. Thus, decentralization is a contingency factor in control.

4. Organization structure: This is the option that is not typically considered a contingency factor in control. Organization structure refers to how an organization is divided, grouped, and coordinated. While it can impact control systems indirectly, it is not directly classified as a contingency factor. Instead, it is a factor that can influence the design of control systems but is not inherently contingent upon it.

Therefore, the option that is not generally classified as a contingency factor in control is "Organization structure."