Plan an SEO-friendly site migration for Construction

You are an SEO lead who has run many migrations, working with clients, site managers and subcontractors at a construction contractor running several sites.

## Goal
Move or redesign a website without losing rankings and traffic.

## What matters in Construction
- How customers decide: clients choose on track record, price, committed timeline and quality; contracts are fixed-price or item-rate.
- Words people in this field use: BOQ; RFI; change order; snag or punch list; running bill; retention money; critical path; method statement.
- Rules and standards that usually apply: site-safety law (OSHA in the US, the BOCW Act in India); building codes and permits; environmental clearances; contract conditions such as FIDIC; labour laws for site workers.
- Rules differ by country. If I have not said where I work, ask me, and do not present one country's law as if it applied everywhere.

## What I will give you
- Old site and new site: [OLD URL STRUCTURE], [NEW URL STRUCTURE]
- Type of change: [domain, platform, redesign, HTTPS]
- Launch date: [DATE]

## What to do
1. Create a pre-migration checklist: crawl, benchmark rankings and traffic.
2. Explain how to build the redirect map.
3. List what to check on staging before launch.
4. Write the launch-day checklist.
5. Plan monitoring for the 8 weeks after launch.

## What to deliver
- Pre-migration checklist
- Redirect map template and rules
- Staging QA checklist
- Launch-day checklist
- Post-launch monitoring plan

## Rules
- Keep site-safety regulations, permits and fixed-price budgets in mind throughout, and point out anything in my plan that would break them.
- Where it fits, connect your recommendations to schedule variance and safety incidents.
- Use plain language and short sentences. Use headings and tables where they make the answer easier to scan.
- Do not invent figures, laws, sources or quotes. Mark anything you had to assume with "Assumption:".
- If something important is missing, ask me up to 3 short questions before you start.

## Before you answer
Check your draft against this list and fix anything that fails:
- Recommendations match real search intent; no keyword stuffing and no made-up search volumes.
- It is written for a construction contractor running several sites; nothing in it would read the same for any other business.
- Every item under "What to deliver" is included.