Use the six tests as one connected diagnostic
Purpose gives the money a destination and establishes priorities. Mathematics tests whether the destination, time, current resources and contribution path can meet. Without these two, a strategy has no definition of success.
Informed risk identifies the uncertainty the required growth carries. Sustainability tests whether the household can afford and behaviourally continue through that uncertainty. A strategy that works only while markets are calm or income is uninterrupted has not passed this test.
Portfolio structure assigns each meaningful part a role rather than collecting attractive products. Continuity and adaptability distinguishes ordinary noise from a genuine change in objective, horizon, resources or circumstances. Miss one of the six and a collection of good investments can still produce a weak strategy.
Two investors want ₹2 crore in 15 years
The target and horizon are identical. The first investor can comfortably contribute what the mathematics requires while preserving emergency liquidity and other priorities. Their strategy can be built around that feasible contribution path and the informed risk the objective requires.
The second investor cannot currently contribute the required amount. More risk is not the automatic answer. They can test a smaller starting contribution with realistic future step-ups, allow more time, change the amount or scope of the objective, reconsider its priority, or recognise existing resources that can legitimately support it. The best strategy is the most credible combination of these choices—not the one with the most optimistic return assumption.
This is where judgement matters. The mathematics exposes the gap; the investor decides which life trade-offs are acceptable; the strategy records an achievable path.
What an investment strategy is not
A SIP is not, by itself, an investment strategy. Neither is a mutual fund or equity. Asset allocation is an important component, not the whole strategy. Core, Strategic and Satellite is portfolio architecture. SIP, STP and SWP are implementation mechanisms. Strategy sits above and connects them.
The best answer can be no new investment
A valid strategy may say continue the existing plan, invest more, invest less than the mathematical ideal because it is sustainable, reduce debt, preserve liquidity, delay action, change the timeline, change the objective, take more informed risk, take less risk, or do nothing because the existing strategy remains appropriate.
Purpose belongs to Financial Goals; proportionate risk belongs to Informed Risk; existing holdings belong to Portfolio Review.
Continuity is part of quality
A strategy should be stable enough to survive ordinary market noise and adaptable enough to respond when the objective, horizon, contribution, liquidity or investor circumstances materially change. Constant reaction is not adaptability; refusing to reconsider a changed reality is not discipline.
Why recent high returns are a poor standalone selection rule belongs to the Return Chasing decision. Detailed evaluation belongs to Mutual Fund Investing.
This page judges strategy; it does not answer where one corpus goes
If you have an amount ready and need to work out what should happen to it, use Where Should I Invest My Money?. This page owns a different question: whether the complete strategy connecting the investor's purpose, maths, risk, structure and continuity is sound.