Develop application architecture best suits the business use cases, taking into consideration of 

• Business priority
• Faster Time to market 
• Development and maintenance cost
• Development team skillset
• Cloud - non-cloud deployment 
• Mobile / web / hybrid application
• Application migration 
• Best fit technology stack

based on these parameters identify and design the best-fit Target Architecture with deliverables like

• Baseline architecture based on the current system
• Target Architecture 
• Transition architecture. (how to move from current to target, applicable for existing apps)
• Architecture guiding principles and patterns should be followed
• Development methodology
• Target technical stack
• Target cloud development 
• Deployment architecture 
• Development pipelines and release process
• Team training requirements
• Required development tools and infrastructure 
• Monitoring tools 
• architecture roadmap / Release planning