Previous posters have said it exactly right. Start with flow. Focus on getting that process organized and successful. You must balance a speed is life mentality with a focus on accuracy. Make sure you have the right trainers and the right team members working in breakouts. Do not be afraid to break from the norm or change up people's routines. The person who has been accustomed to doing a specific task may not be the best person for the task, so you have to be willing to try different team members. Flow is your most agile resource, you can make changes and see instantly if it was successful. If it wasn't, you go back to the old process or find a new one.
Once your flow team is moving efficiently and accurately and meeting your speed expectations, you should be able to spend more time working with the backroom. Luckily, once flow is on pace, the backroom portion is substantially easier. If flow is behind, backroom will be too. Try new processes in the back. See what works for you. Are you bowling out the pallets from the truck? We usually have 1 team member bowl and the others follow while backstocking. If the aisles are full, encourage them to help each other so you minimize steps going up and down ladders. Any free time you have, you can have the team start to low and pro the backroom, moving product down into empty locations near the ground so it's quicker and easier to pull. Teach them how to do things like the empty location report, so that you can proactively minimize ghosts. Identify your high performing team members, and teach them how to work the audit batch and backroom SDA. Backroom should be able to be pretty self-sufficient.
Instocks is your tool. It allows you to understand where the chinks in the armor are. Instocks scores are mostly a reflection on your other processes. Instocks may be graded on things such as backroom percent, but they do not control the metric. That is on flow, backroom, and autofills. You will be able to use your instocks team to assess where the flow team is missing opportunities to fill multiple locations and help keep d-code out of the backroom. Teach instocks to flex and fill proactively. Endcaps are your friend, keep them full and impactful by shopping from the backroom. Empower them and encourage them to PTM aggressively. If you have a high performer, get them familiar with the MPG-At-A-Glance tool, so they can see upcoming transitions before they hit the PTM app. This will keep your workload more consistent and prevent so much from hitting when the aisles go MPG. These are your eyes and ears. Teach them to be aware as they work and report trends that you see; is flow over or underpushing certain areas? Are you missing second and third locations? They walk the store daily, utilize them to understand where your problem areas are and you can solve them.
Most importantly, teach and delegate. You can not be the hero by yourself, target is not asking you to. You are there to develop and lead a team that can function without you. Make sure you get the right people on the right tasks and teach them what they need to know.