In brief
- 01
Most companies now use AI, yet only 39% of respondents to McKinsey's 2025 survey reported any effect on profit, and the companies that profit most were nearly 3 times as likely to have redesigned the work.1
- 02
In a trial with 758 consultants, AI made 18 tasks faster and better but left people 19% less likely to get a similar-looking task right, so a person should approve its work at first.3
- 03
Run each new task in draft mode for about 4 weeks, then remove approval only where your own counts clear a threshold you wrote down before the trial began.
AI earns its place in a company where the work is reading, writing, sorting and checking, and where a person can catch a mistake cheaply. Start in draft mode: the AI prepares the work and a person approves it. Remove the approval step one task at a time, and only when your own data shows the drafts are reliable. Keep decisions that cannot be undone with people.
Most companies use AI, and few can see it in their profits
In McKinsey’s 2025 survey, 88% of respondents said their organizations used AI regularly in at least one business function. Only 39% reported any effect on EBIT, and most of those said AI accounted for less than 5% of it.1 BCG’s 2024 survey of 1,000 executives found that 74% of companies had yet to see tangible value from AI. About 70% of the obstacles were people and process, against 20% technology and 10% the algorithms.2
The companies that profit most work differently. McKinsey’s high performers, who attribute more than 5% of EBIT to AI, were nearly three times as likely as everyone else to have redesigned their workflows around AI.
The lesson holds for a small company as much as for a multinational. A model added to a broken workflow produces faster versions of the same problems. The value comes from redesigning the work around what the model does well, and around what it should never do.
The best first uses save time on a draft and fail safely
Good first candidates share two traits. A draft saves real time, and a person can check it quickly. In companies, that usually means:
- Intake. Reading incoming emails, forms and documents, and pulling out the details a person would otherwise retype.
- Drafting. Preparing replies, status updates and first versions of routine reports for a person to edit and send.
- Sorting and routing. Tagging requests by type and urgency, and sending each to the right person.
- Extraction. Turning invoices, contracts or delivery notes into structured records.
- Quality checks. Comparing a deliverable against a checklist before a person reviews it.
Each of these replaces minutes of reading or typing with seconds of checking. None of them lets the AI act alone on a client, a contract or a payment.
A test you can run
If an AI had drafted every client email you sent last week, which ones would you still want to read before they went out?
Pull 50 emails your team sent last week and sort them into two piles: those where a wrong draft would cost a few minutes to correct, and those where it would cost a client, a date or money. The first pile is where draft mode can start. The second pile stays with people, however good the drafts become.
A person approves first because AI fails unevenly
The strongest evidence for approval comes from a professional services firm. In a randomized trial, 758 Boston Consulting Group consultants worked with or without GPT-4. On 18 realistic tasks, those with AI finished 12.2% more of the work, 25.1% faster, at higher quality. On one task chosen to sit just outside the model’s abilities, they were 19% less likely to reach the right answer.3
| Task | Effect of AI access |
|---|---|
| 18 tasks within AI's reach | 12.2% more tasks, 25.1% faster |
| 1 task outside AI's reach | 19% less likely to be right |
Source: Dell'Acqua et al., field experiment with 758 BCG consultants3
The task that went wrong looked no harder than the others. That is the practical problem. You cannot tell in advance which of your tasks sit inside the AI’s reach, so you find out by checking its drafts and counting.
Decisions you cannot undo stay with a person
Some decisions should stay with a person however good the drafts become. These include commitments on price or dates, refunds above a set amount, legal notices, anything involving safety, and anything a client would be upset to learn a machine decided.
A useful rule: if an error would cost more to fix than the AI saves in a month, a person approves it. The rule is deliberately conservative. Approval costs seconds. A wrong promise to a client can cost the account.
Approval comes off on evidence, never on confidence
Treat draft mode as a measurement period. Every approval is a data point: was the draft sent as is, lightly edited or rewritten? After about four weeks, the pattern is clear for each type of task. Track three things for each:
- The share of drafts approved without changes.
- The kinds of edits people make, and whether they fix style or substance.
- Any error that would have reached a client if nobody had checked.
When a task type reaches a threshold the owner set in advance, measured on the company’s own data, it can run automatically with a person checking a regular sample. When it does not, it stays in draft mode, and the drafts still save time.
The threshold is a business decision. A company may accept a lower bar for internal summaries than for client emails. What matters is that it is written down before the trial starts, so nobody argues from anecdotes afterwards.
Where this is the wrong answer
Draft mode is the wrong place to start when a task runs only a few times a month. You will never log enough drafts to judge it, and doing the work by hand costs less than writing the rules. It is also premature where your team does not yet agree on what a good answer looks like. If two account managers would answer the same email differently, an AI will copy the disagreement faster. Agree the rule first, then let the AI draft to it.
The rules you write down matter more than the model
AI drafts are only as good as the rules and examples behind them. Most companies keep those rules in people’s heads: how we word a delay, when we offer a discount, which clients get a call instead of an email. Writing them down is much of the work of an AI project. It is also the same work as mapping the process, which is why a company that has mapped its operations already holds much of what the AI needs.
Illustration. An agency of about 40 people receives about 60 client emails a day asking where a project stands. An AI reads each one, finds the project in the operations system and drafts a reply with the current stage and the next milestone. An account manager approves or edits each draft. After four weeks, status replies are approved unchanged almost every time, so they move to automatic sending, with a person checking a weekly sample. Replies about scope or budget stay in the approval queue, because a wrong answer there costs a client relationship.
One task and one written approval rule are enough to start
Pick a task your team does many times a week, where a draft would save time and an error is easy to catch. Write down what a good output looks like, what the AI may never do and who approves. The playbook Write an approval rule an AI can follow sets out the page. Run the task in draft mode for a month and count. You will then know, from your own data, whether AI has earned its place in that task.
Sources
- 1
The state of AI in 2025: Agents, innovation, and transformation. McKinsey & Company (QuantumBlack, AI by McKinsey), 2025.
Sample: Online survey of 1,993 participants in 105 countries, all company sizes, June 25 to July 29, 2025. AI high performers n = 109, all others n = 1,644.
ModerateA large survey with a published method, but self-reported and weighted toward larger companies. Good for the gap between using AI and profiting from it; it cannot predict the return in any one company.
- 2
AI Adoption in 2024: 74% of Companies Struggle to Achieve and Scale Value (Where's the Value in AI?). Boston Consulting Group, 2024.
Sample: Survey of 1,000 CxOs and senior executives in 59 countries and more than 20 sectors.
DirectionalLarge-company executives rating their own programs, and the 70/20/10 split is BCG's summary. Trust the direction (people and process outweigh technology), not the exact shares.
- 3
Navigating the Jagged Technological Frontier: Field Experimental Evidence of the Effects of Artificial Intelligence on Knowledge Worker Productivity and Quality. Dell'Acqua, McFowland, Mollick and others, Organization Science, 2026.
Sample: Preregistered experiment with 758 Boston Consulting Group consultants, randomly assigned to work with or without GPT-4 on 18 realistic tasks and 1 task chosen to sit outside the model's abilities.
ModerateRandomized and run inside a professional services firm, so the population is close. But it is one large firm, one 2023 model and set tasks. It shows that AI errs unevenly; it cannot tell you how often it errs on your tasks.
- Moderate
- Sound method, but a different population, a smaller sample or an older study. Good for direction and rough size.
- Directional
- Survey, vendor or expert estimate. Trust the direction; treat the exact number as soft.



