A push system is a production system that operates based on forecasts and schedules, rather than actual customer demand. A push system pushes products to the market regardless of the current demand, and often results in excess inventory and waste. A push system does not consider the capacity constraints of the work centers, and therefore may send work orders to them even if they are not able to process them. This can create bottlenecks, delays, and inefficiencies in the production process12.
The other options are not correct because:
*B. Work centers are scheduled using finite capacity planning. This is not a characteristic of a push system, but rather a pull system. Finite capacity planning is a method of scheduling that takes into account the actual capacity of the work centers, and only releases work orders when there is enough capacity to process them.
This reduces the risk of overloading the work centers and improves the flow of production3.
*C. Work centers operate using decentralized control. This is not a characteristic of a push system, but rather a pull system. Decentralized control is a method of management that gives more autonomy and decision-making power to the work centers, and allows them to adjust their production according to the actual demand and capacity. This increases the flexibility and responsiveness of the production system4.
*D. Work centers signal previous work centers when they are ready for more work. This is not a characteristic of a push system, but rather a pull system. This is a common practice in a pull system that uses kanban cards as visual signals to trigger the production or replenishment of a product. The work centers only request more work when they have enough capacity and demand for it, and avoid overproduction and waste5.
References := 1 Push System vs. Pull System: Adopting A Hybrid Approach To MRP1 2 Push Systems vs.
Pull System: Definitions and Differences4 3 Finite Capacity Planning - an overview | ScienceDirect Topics 4 Centralized vs. Decentralized Manufacturing | IndustryWeek 5 Kanban - an overview | ScienceDirect Topics

Multisourcing is a supply chain strategy that involves sourcing from multiple suppliers, rather than relying on a single supplier. Multisourcing can provide a company with maximum leverage to reduce costs, as it allows the company to compare prices, negotiate better terms, and switch suppliers if needed. Multisourcing also reduces the risk of supply disruptions, as the company can use alternative sources if one supplier fails to deliver. Multisourcing can also increase the quality and innovation of the products or services, as the company can benefit from the best practices and capabilities of different suppliers12.
The other options are not correct because:
*A. Single sourcing. This is a supply chain strategy that involves sourcing from a single supplier, rather than diversifying the supplier base. Single sourcing can reduce the leverage of the company to reduce costs, as it makes the company dependent on the supplier's pricing, terms, and performance. Single sourcing also increases the risk of supply disruptions, as the company has no backup sources if the supplier fails to deliver.
Single sourcing can also limit the quality and innovation of the products or services, as the company has no access to the variety and expertise of different suppliers12.
*C. Long-term agreement. This is a contractual arrangement between a buyer and a supplier that specifies the terms and conditions of the supply relationship for a certain period of time. Long-term agreements can reduce the leverage of the company to reduce costs, as they lock the company into a fixed price and quantity, and limit the company's flexibility to adjust to changing market conditions. Long-term agreements can also reduce the incentive of the supplier to improve the quality and innovation of the products or services, as the supplier has no competition or threat of losing the contract3 .
*D. Service-level agreement (SLA). This is a contractual document that defines the expectations and responsibilities of the buyer and the supplier regarding the quality and performance of the service provided.
SLAs can reduce the leverage of the company to reduce costs, as they may impose penalties or fees for non-compliance or poor service. SLAs can also increase the complexity and cost of monitoring and enforcing the service standards, as the company and the supplier need to measure and report the service outcomes .
References := 1 Single Sourcing vs. Multiple Sourcing: Which Is Better?1 2 Single Sourcing vs. Multiple Sourcing: What's the Difference?2 3 Long-Term Agreements: What Are They and Why Do They Matter?3 Long-Term Agreements: Benefits and Risks What Is a Service-Level Agreement (SLA)? Service-Level Agreement (SLA) - an overview | ScienceDirect Topics