Final answer:
Selcaz Inc. is using the open innovation model by inviting external parties to participate in an innovation challenge to create new solutions or products for the video game industry.
Step-by-step explanation:
In the scenario where Selcaz Inc., a video game company, is opening up an innovation challenge to third parties and targeted groups of innovators across different networks, the company is employing a problem-solving model known as open innovation.
Open innovation is a model where businesses go beyond their internal resources and invite external sources, such as customers, researchers, and other stakeholders, to contribute to the development of new products or solutions. By leveraging external ideas and market paths, Selcaz Inc. looks to enhance its innovation capabilities and possibly gain a competitive advantage in the video game industry.