Then engineers devote themselves to the solution of the work packages, giving the entire team information about their current status in regular status meetings and modifying the schedule by possible delays. In order to check the functionality of a product solution or to reduce the risk of undesirable developments, the creation of a preprototype and a prototype is recommended. The results from strategic product management serve as a prerequisite for a successful product management (Go-To-Market). Product marketing is a component of product management that is under the jurisdiction of a company's product manager or product marketing manager. The product marketing manager is primarily responsible for the profitability of the products, product launches, messaging and all sales-supporting materials. Together with the communication team (press department) the plan for all marketing activities and the communication channels has to be created. At the same time measuring points (KPIs) need to be defined for reviewing the success of the marketing measures and regularly present their evaluation. Product marketing is involved in strategic derivatives such as market strategies, distribution strategies, positioning and communication strategies. Sales documents, presentations and tools from the results have to be created while the sales channels need to be supported with the relevant market facts from the strategic section so that their forecast is fact-based and more accurate. Through the contact with customers and non-customers the buyer persona develop steadily and their buying criteria, channels and problems van be identified and optimized. The product marketing manager creates the positioning for all defined market segments and enables the sales channels to deliver the persona-specific selling points. Responsibilities within product marketing include:  Product development is the process of building products that will be consumed or used by others. Product managers often work collaboratively with engineers, designers, and other stakeholders to accomplish tasks, such as:   Many refer to inbound (product development) and outbound (product marketing) functions. Inbound product management (aka inbound marketing) is the "radar" of the organization and involves absorbing information like customer research, competitive intelligence, industry analysis, trends, economic signals and competitive activity as well as documenting requirements and setting product strategy. In comparison, outbound activities are focused on distributing or pushing messages, training sales people, go to market strategies and communicating messages through channels like advertising, PR and events. In many organizations the inbound and outbound functions are performed by the same person. As these terms are under discussion, another way of looking at these activities is upstream and downstream product management, where 'upstream' is referring to any activity that helps to define, create, or improve the product, while 'downstream' refers to any activity that promotes the product.